Organisationsmirageptt2bd7e5 ()(lint-fmt)

(lint-fmt)

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2024-10-15 10:27.20: New job: test mirage/ptt https://github.com/mirage/ptt.git#refs/heads/master (2bd7e5e4e9b36b94d66c5b980a4d5a9c1f25c764) (linux-x86_64:(lint-fmt))
Base: ocaml/opam:debian-12-ocaml-4.08@sha256:313659e036d93aad64e3d503c7a2aa6326e0a2c7426087b094ccca6aed7d1612
ocamlformat version: version 0.26.2 (from opam)

To reproduce locally:

git clone --recursive "https://github.com/mirage/ptt.git" -b "master" && cd "ptt" && git reset --hard 2bd7e5e4
cat > Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-12-ocaml-4.08@sha256:313659e036d93aad64e3d503c7a2aa6326e0a2c7426087b094ccca6aed7d1612
USER 1000:1000
RUN cd ~/opam-repository && (git cat-file -e 525e9f91783f83939e57ae00eb12498294707461 || git fetch origin master) && git reset -q --hard 525e9f91783f83939e57ae00eb12498294707461 && git log --no-decorate -n1 --oneline && opam update -u
RUN opam depext -i dune
WORKDIR /src
RUN opam depext -i ocamlformat=0.26.2
COPY --chown=1000:1000 . /src/
RUN opam exec -- dune build @fmt --ignore-promoted-rules || (echo "dune build @fmt failed"; exit 2)

END-OF-DOCKERFILE
docker build .
END-REPRO-BLOCK

2024-10-15 10:27.20: Using cache hint "mirage/ptt-ocaml/opam:debian-12-ocaml-4.08@sha256:313659e036d93aad64e3d503c7a2aa6326e0a2c7426087b094ccca6aed7d1612-debian-12-4.08_opam-2.2-ocamlformat-525e9f91783f83939e57ae00eb12498294707461"
2024-10-15 10:27.20: Using OBuilder spec:
((from ocaml/opam:debian-12-ocaml-4.08@sha256:313659e036d93aad64e3d503c7a2aa6326e0a2c7426087b094ccca6aed7d1612)
 (user (uid 1000) (gid 1000))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "cd ~/opam-repository && (git cat-file -e 525e9f91783f83939e57ae00eb12498294707461 || git fetch origin master) && git reset -q --hard 525e9f91783f83939e57ae00eb12498294707461 && git log --no-decorate -n1 --oneline && opam update -u"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "opam depext -i dune"))
 (workdir /src)
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "opam depext -i ocamlformat=0.26.2"))
 (copy (src .) (dst /src/))
 (run (shell "opam exec -- dune build @fmt --ignore-promoted-rules || (echo \"dune build @fmt failed\"; exit 2)"))
)

2024-10-15 10:27.20: Waiting for resource in pool OCluster
2024-10-15 10:27.21: Waiting for worker…
2024-10-15 10:27.21: Got resource from pool OCluster
Building on x86-bm-c19.sw.ocaml.org
HEAD is now at b69448b .
HEAD is now at 2bd7e5e Update unikernels with mirage.4.8.0

(from ocaml/opam:debian-12-ocaml-4.08@sha256:313659e036d93aad64e3d503c7a2aa6326e0a2c7426087b094ccca6aed7d1612)
2024-10-15 10:28.08 ---> saved as "8ac68bced7188653db7b81863dbdd05e2bdaccde05c724cc4b90798d2e42b237"

/: (user (uid 1000) (gid 1000))

/: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
        (network host)
        (shell "cd ~/opam-repository && (git cat-file -e 525e9f91783f83939e57ae00eb12498294707461 || git fetch origin master) && git reset -q --hard 525e9f91783f83939e57ae00eb12498294707461 && git log --no-decorate -n1 --oneline && opam update -u"))
From https://github.com/ocaml/opam-repository
 * branch                  master     -> FETCH_HEAD
   75006f8c5e..cdc6ae9b86  master     -> origin/master
525e9f9178 Merge pull request #26639 from mtelvers/opam-publish-ocaml-version.3.6.9

<><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><>
[default] synchronised from file:///home/opam/opam-repository
default (at file:///home/opam/opam-repository): 
    [INFO] opam 2.1 and 2.2 include many performance and security improvements over 2.0; please consider upgrading (https://opam.ocaml.org/doc/Install.html)


Everything as up-to-date as possible (run with --verbose to show unavailable upgrades).
However, you may "opam upgrade" these packages explicitly, which will ask permission to downgrade or uninstall the conflicting packages.
Nothing to do.
# Run eval $(opam env) to update the current shell environment
2024-10-15 10:29.28 ---> saved as "a21bd7513dcf5833d662789450c6f33572a4c1a9f3b46154afd115a32f751142"

/: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
        (network host)
        (shell "opam depext -i dune"))
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
# No extra OS packages requirements found.
# All required OS packages found.
# Now letting opam install the packages
The following actions will be performed:
  - install dune 3.16.0

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[dune.3.16.0] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> installed dune.3.16.0
Done.
# Run eval $(opam env) to update the current shell environment
2024-10-15 10:30.18 ---> saved as "1c0aa1ffcd30b30e93efe5f8f110da1163e6dbc8e3b92fd8a8595449e53f7d11"

/: (workdir /src)

/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
           (network host)
           (shell "opam depext -i ocamlformat=0.26.2"))
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
# No extra OS packages requirements found.
# All required OS packages found.
# Now letting opam install the packages
The following actions will be performed:
  - install sexplib0          v0.14.0  [required by base]
  - install ocaml-version     3.6.9    [required by ocamlformat-lib]
  - install menhirLib         20240715 [required by ocamlformat-lib]
  - install menhirCST         20240715 [required by menhir]
  - install menhirSdk         20240715 [required by ocamlformat-lib]
  - install ocamlbuild        0.15.0   [required by fpath, astring, uuseg]
  - install either            1.0.0    [required by ocamlformat-lib]
  - install ocamlfind         1.9.6    [required by ocp-indent, astring, fpath, uuseg]
  - install cmdliner          1.3.0    [required by ocamlformat]
  - install result            1.5      [required by ocamlformat-lib]
  - install seq               base     [required by re]
  - install csexp             1.5.2    [required by ocamlformat-lib]
  - install camlp-streams     5.0.1    [required by ocamlformat-lib]
  - install dune-build-info   3.16.0   [required by ocamlformat-lib]
  - install fix               20230505 [required by ocamlformat-lib]
  - install menhir            20240715 [required by ocamlformat-lib]
  - install topkg             1.0.7    [required by fpath, astring, uuseg]
  - install base-bytes        base     [required by ocp-indent]
  - install re                1.11.0   [required by ocamlformat]
  - install dune-configurator 3.16.0   [required by base]
  - install uutf              1.0.3    [required by ocamlformat-lib]
  - install astring           0.8.5    [required by ocamlformat-lib]
  - install ocp-indent        1.8.1    [required by ocamlformat-lib]
  - install base              v0.14.3  [required by ocamlformat-lib]
  - install uucp              15.0.0   [required by uuseg]
  - install fpath             0.7.3    [required by ocamlformat-lib]
  - install stdio             v0.14.0  [required by ocamlformat-lib]
  - install uuseg             15.0.0   [required by ocamlformat-lib]
  - install ocamlformat-lib   0.26.2   [required by ocamlformat]
  - install ocamlformat       0.26.2
===== 30 to install =====

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[astring.0.8.5] found in cache
[base.v0.14.3] found in cache
[camlp-streams.5.0.1] found in cache
[cmdliner.1.3.0] found in cache
[csexp.1.5.2] found in cache
[dune-build-info.3.16.0] found in cache
[dune-configurator.3.16.0] found in cache
[either.1.0.0] found in cache
[fix.20230505] found in cache
[fpath.0.7.3] found in cache
[menhir.20240715] found in cache
[menhirCST.20240715] found in cache
[menhirLib.20240715] found in cache
[menhirSdk.20240715] found in cache
[ocaml-version.3.6.9] found in cache
[ocamlbuild.0.15.0] found in cache
[ocamlfind.1.9.6] found in cache
[ocamlformat.0.26.2] found in cache
[ocamlformat-lib.0.26.2] found in cache
[ocp-indent.1.8.1] found in cache
[re.1.11.0] found in cache
[result.1.5] found in cache
[sexplib0.v0.14.0] found in cache
[stdio.v0.14.0] found in cache
[topkg.1.0.7] found in cache
[uucp.15.0.0] found in cache
[uuseg.15.0.0] found in cache
[uutf.1.0.3] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> installed seq.base
-> installed camlp-streams.5.0.1
-> installed csexp.1.5.2
-> installed either.1.0.0
-> installed fix.20230505
-> installed cmdliner.1.3.0
-> installed menhirCST.20240715
-> installed menhirLib.20240715
-> installed menhirSdk.20240715
-> installed ocaml-version.3.6.9
-> installed re.1.11.0
-> installed result.1.5
-> installed sexplib0.v0.14.0
-> installed dune-build-info.3.16.0
-> installed dune-configurator.3.16.0
-> installed ocamlfind.1.9.6
-> installed base-bytes.base
-> installed ocp-indent.1.8.1
-> installed ocamlbuild.0.15.0
-> installed base.v0.14.3
-> installed stdio.v0.14.0
-> installed topkg.1.0.7
-> installed uutf.1.0.3
-> installed astring.0.8.5
-> installed menhir.20240715
-> installed fpath.0.7.3
-> installed uucp.15.0.0
-> installed uuseg.15.0.0
-> installed ocamlformat-lib.0.26.2
-> installed ocamlformat.0.26.2
Done.

<><> ocp-indent.1.8.1 installed successfully ><><><><><><><><><><><><><><><><><>
=> This package requires additional configuration for use in editors. Install package 'user-setup', or manually:

   * for Emacs, add these lines to ~/.emacs:
     (add-to-list 'load-path "/home/opam/.opam/4.08/share/emacs/site-lisp")
     (require 'ocp-indent)

   * for Vim, add this line to ~/.vimrc:
     set rtp^="/home/opam/.opam/4.08/share/ocp-indent/vim"
# Run eval $(opam env) to update the current shell environment
2024-10-15 10:31.43 ---> saved as "a988629b13740c3a147799fe4edea7ee5600efc089ba4cfa6fcf9fb2e5da4fc1"

/src: (copy (src .) (dst /src/))
2024-10-15 10:31.43 ---> saved as "d3fa9c9f7dfa8f81c0a08e66b072f0c58e4109a80e52ef5c8da6dc45741428f7"

/src: (run (shell "opam exec -- dune build @fmt --ignore-promoted-rules || (echo \"dune build @fmt failed\"; exit 2)"))
File "lib/dune", line 1, characters 0-0:
diff --git a/_build/default/lib/dune b/_build/default/lib/.formatted/dune
index 4d91bea..3509eb5 100644
--- a/_build/default/lib/dune
+++ b/_build/default/lib/.formatted/dune
@@ -31,16 +31,18 @@
 (library
  (name ptt)
  (public_name ptt)
- (modules ptt authentication logic mechanism messaged relay sMTP sSMTP submission)
- (libraries ptt.common ptt.flow ptt.aggregate digestif mrmime colombe.emile domain-name dns sendmail.starttls
-   logs ipaddr)
+ (modules ptt authentication logic mechanism messaged relay sMTP sSMTP
+   submission)
+ (libraries ptt.common ptt.flow ptt.aggregate digestif mrmime colombe.emile
+   domain-name dns sendmail.starttls logs ipaddr)
  (preprocess future_syntax))
 
 (library
  (name ptt_server)
  (public_name ptt.server)
  (modules ptt_server)
- (libraries lwt tls-mirage bigstringaf mirage-time mirage-flow tcpip mimic ptt))
+ (libraries lwt tls-mirage bigstringaf mirage-time mirage-flow tcpip mimic
+   ptt))
 
 (library
  (name ptt_fake_dns)
@@ -52,25 +54,29 @@
  (name lipap)
  (public_name ptt.lipap)
  (modules lipap)
- (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server dns-client-mirage))
+ (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server
+   dns-client-mirage))
 
 (library
  (name mti_gf)
  (public_name ptt.mti-gf)
  (modules mti_gf)
- (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server dns-client-mirage))
+ (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server
+   dns-client-mirage))
 
 (library
  (name nec)
  (public_name ptt.nec)
  (modules nec)
- (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server dkim-mirage dns-client-mirage))
+ (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server
+   dkim-mirage dns-client-mirage))
 
 (library
  (name hm)
  (public_name ptt.hm)
  (modules hm)
- (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server uspf-mirage))
+ (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server
+   uspf-mirage))
 
 (library
  (name ptt_value)
@@ -82,4 +88,5 @@
  (name spartacus)
  (public_name ptt.spartacus)
  (modules spartacus)
- (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server spamtacus-mirage dns-client-mirage))
+ (libraries mirage-time mirage-clock mirage-random ptt ptt.map ptt.server
+   spamtacus-mirage dns-client-mirage))
File "test/dune", line 1, characters 0-0:
diff --git a/_build/default/test/dune b/_build/default/test/.formatted/dune
index 0618a48..4e93efb 100644
--- a/_build/default/test/dune
+++ b/_build/default/test/.formatted/dune
@@ -2,7 +2,8 @@
  (name test)
  (modules test)
  (libraries logs.fmt mirage-crypto-rng.unix ipaddr.unix bos threads mrmime
-   mirage-time-unix mirage-clock-unix ptt ptt.server alcotest-lwt tcpip.stack-socket))
+   mirage-time-unix mirage-clock-unix ptt ptt.server alcotest-lwt
+   tcpip.stack-socket))
 
 (rule
  (alias runtest)
File "lib/ptt_aggregate.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_aggregate.mli b/_build/default/lib/.formatted/ptt_aggregate.mli
index ca2e477..14ee1c7 100644
--- a/_build/default/lib/ptt_aggregate.mli
+++ b/_build/default/lib/.formatted/ptt_aggregate.mli
@@ -1 +1,4 @@
-val to_recipients : info:Ptt_common.info -> Colombe.Forward_path.t list -> Ptt_sendmail.recipients list
+val to_recipients :
+     info:Ptt_common.info
+  -> Colombe.Forward_path.t list
+  -> Ptt_sendmail.recipients list
File "lib/mxs.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/mxs.mli b/_build/default/lib/.formatted/mxs.mli
index 809ca8b..4a07a96 100644
--- a/_build/default/lib/mxs.mli
+++ b/_build/default/lib/.formatted/mxs.mli
@@ -4,5 +4,7 @@ val pp_key : key Fmt.t
 
 include Map.S with type key := key
 
-val v : preference:int -> domain:[ `host ] Domain_name.t -> Ipaddr.t -> Ipaddr.t t
+val v :
+  preference:int -> domain:[ `host ] Domain_name.t -> Ipaddr.t -> Ipaddr.t t
+
 val vs : (Dns.Mx.t * Ipaddr.t) list -> Ipaddr.t t
File "lib/lipap.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/lipap.mli b/_build/default/lib/.formatted/lipap.mli
index 32c79bc..ca26d9c 100644
--- a/_build/default/lib/lipap.mli
+++ b/_build/default/lib/.formatted/lipap.mli
@@ -12,8 +12,7 @@ module Make
     (Pclock : Mirage_clock.PCLOCK)
     (Stack : Tcpip.Stack.V4V6)
     (Dns_client : Dns_client_mirage.S)
-    (Happy_eyeballs : Happy_eyeballs_mirage.S with type flow = Stack.TCP.flow) :
-sig
+    (Happy_eyeballs : Happy_eyeballs_mirage.S with type flow = Stack.TCP.flow) : sig
   val job :
        ?limit:int
     -> ?stop:Lwt_switch.t
File "lib/mxs.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/mxs.ml b/_build/default/lib/.formatted/mxs.ml
index 624a0c5..31e1d84 100644
--- a/_build/default/lib/mxs.ml
+++ b/_build/default/lib/.formatted/mxs.ml
@@ -3,20 +3,22 @@ type key = Dns.Mx.t
 let pp_key : key Fmt.t =
  fun ppf elt ->
   Fmt.pf ppf "{ @[<hov>preference= %d;@ mail_exchange= %a;@] }"
-    elt.Dns.Mx.preference Domain_name.pp
-    elt.Dns.Mx.mail_exchange
+    elt.Dns.Mx.preference Domain_name.pp elt.Dns.Mx.mail_exchange
 
 module Key = struct
   type t = key
 
-  let compare {Dns.Mx.preference= a; _} {Dns.Mx.preference= b; _} = Int.compare a b
+  let compare {Dns.Mx.preference= a; _} {Dns.Mx.preference= b; _} =
+    Int.compare a b
 end
 
 include (Map.Make (Key) : Map.S with type key := key)
 
 let v ~preference ~domain:mail_exchange ipaddr =
-  singleton { preference; mail_exchange } ipaddr
+  singleton {preference; mail_exchange} ipaddr
 
 let vs =
-  (Fun.flip List.fold_left empty) begin fun acc (mx, ipaddr) ->
-    add mx ipaddr acc end
+  (Fun.flip List.fold_left empty)
+    begin
+      fun acc (mx, ipaddr) -> add mx ipaddr acc
+    end
File "lib/ptt_fake_dns.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_fake_dns.mli b/_build/default/lib/.formatted/ptt_fake_dns.mli
index 575c8b6..2bf7777 100644
--- a/_build/default/lib/ptt_fake_dns.mli
+++ b/_build/default/lib/.formatted/ptt_fake_dns.mli
@@ -1,5 +1,8 @@
-module Make (Destination : sig val ipaddr : Ipaddr.t end) : sig
-  include Dns_client_mirage.S
-    with type 'a Transport.io = 'a Lwt.t
-     and type Transport.stack = unit
+module Make (Destination : sig
+  val ipaddr : Ipaddr.t
+end) : sig
+  include
+    Dns_client_mirage.S
+      with type 'a Transport.io = 'a Lwt.t
+       and type Transport.stack = unit
 end
File "lib/authentication.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/authentication.ml b/_build/default/lib/.formatted/authentication.ml
index 1fdd531..4990dac 100644
--- a/_build/default/lib/authentication.ml
+++ b/_build/default/lib/.formatted/authentication.ml
@@ -7,8 +7,7 @@ type 'k t = username -> 'k password -> bool Lwt.t
 and username = [ `Dot_string of string list | `String of string ]
 and 'k password = 'k Digestif.t
 
-external v : (username -> 'k password -> bool Lwt.t) -> 'k t
-  = "%identity"
+external v : (username -> 'k password -> bool Lwt.t) -> 'k t = "%identity"
 
 let is_zero = ( = ) '\000'
 
@@ -26,23 +25,28 @@ let decode_plain_authentication hash ?stamp t v =
     char '\000' *> available >>= take >>= fun v2 -> return (v0, v1, v2) in
   let payload =
     Base64.decode ~pad:false (* XXX(dinosaure): not really sure. *) v
-    >>= (R.reword_error (fun _ -> `Msg "Invalid input") <.> Angstrom.parse_string ~consume:All parser) in
+    >>= (R.reword_error (fun _ -> `Msg "Invalid input")
+        <.> Angstrom.parse_string ~consume:All parser) in
   match stamp, payload with
   | Some stamp, Ok (v0, v1, v2) ->
     if Eqaf.equal stamp v0 then
-      match Angstrom.parse_string ~consume:All Colombe.Path.Decoder.local_part v1 with
+      match
+        Angstrom.parse_string ~consume:All Colombe.Path.Decoder.local_part v1
+      with
       | Ok username -> authenticate hash username v2 t
       | Error _ -> Lwt.return (R.error_msgf "Invalid username: %S" v1)
     else Lwt.return (R.error_msgf "Invalid stamp")
-  | None, Ok ("", v1, v2) ->
-    begin match Angstrom.parse_string ~consume:All Colombe.Path.Decoder.local_part v1 with
+  | None, Ok ("", v1, v2) -> begin
+    match
+      Angstrom.parse_string ~consume:All Colombe.Path.Decoder.local_part v1
+    with
     | Ok username -> authenticate hash username v2 t
-    | Error _ -> Lwt.return (R.error_msgf "Invalid username: %S" v1) end
+    | Error _ -> Lwt.return (R.error_msgf "Invalid username: %S" v1)
+  end
   | None, Ok (_, _, _) -> Lwt.return (R.error_msgf "Unexpected stamp")
   | _, (Error _ as err) -> Lwt.return err
 
 type mechanism = PLAIN of string option
 
 let decode_authentication hash m t v =
-  match m with
-  | PLAIN stamp -> decode_plain_authentication hash ?stamp t v
+  match m with PLAIN stamp -> decode_plain_authentication hash ?stamp t v
File "lib/ptt_map.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_map.mli b/_build/default/lib/.formatted/ptt_map.mli
index 8918807..b5c9bdd 100644
--- a/_build/default/lib/ptt_map.mli
+++ b/_build/default/lib/.formatted/ptt_map.mli
@@ -4,7 +4,10 @@ type local = [ `Dot_string of string list | `String of string ]
 val postmaster : t -> Emile.mailbox
 val empty : postmaster:Emile.mailbox -> t
 val add : local:local -> Emile.mailbox -> t -> unit
-val exists_as_sender : Colombe.Reverse_path.t -> info:Ptt_common.info -> t -> bool
+
+val exists_as_sender :
+  Colombe.Reverse_path.t -> info:Ptt_common.info -> t -> bool
+
 val recipients : local:local -> t -> Colombe.Forward_path.t list
 val all : t -> Colombe.Forward_path.t list
 
File "lib/messaged.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/messaged.ml b/_build/default/lib/.formatted/messaged.ml
index 02a8ef5..af21617 100644
--- a/_build/default/lib/messaged.ml
+++ b/_build/default/lib/.formatted/messaged.ml
@@ -3,12 +3,13 @@ open Colombe
 type from = Reverse_path.t * (string * string option) list
 type recipient = Forward_path.t * (string * string option) list
 
-type key =
-  { domain_from: Domain.t
+type key = {
+    domain_from: Domain.t
   ; from: from
   ; recipients: recipient list
   ; id: int64
-  ; ip: Ipaddr.t }
+  ; ip: Ipaddr.t
+}
 
 let domain_from {domain_from; _} = domain_from
 let from {from; _} = from
File "lib/ptt_sendmail.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_sendmail.mli b/_build/default/lib/.formatted/ptt_sendmail.mli
index c920110..065b300 100644
--- a/_build/default/lib/ptt_sendmail.mli
+++ b/_build/default/lib/.formatted/ptt_sendmail.mli
@@ -22,24 +22,30 @@
     per domain listed in the receivers (and not one email per receiver).
 *)
 
-type recipients =
-  { domain : [ `Ipaddr of Ipaddr.t | `Domain of [ `host ] Domain_name.t ]
-  ; locals : [ `All | `Postmaster | `Some of Emile.local list ] }
-and 'dns t and elt =
-  { sender : Colombe.Reverse_path.t
-  ; recipients : recipients
-  ; data : string Lwt_stream.t
-  ; policies : policy list
-  ; id : Mrmime.MessageID.t }
-and pool = { pool : 'a. (resource -> 'a Lwt.t) -> 'a Lwt.t }
+type recipients = {
+    domain: [ `Ipaddr of Ipaddr.t | `Domain of [ `host ] Domain_name.t ]
+  ; locals: [ `All | `Postmaster | `Some of Emile.local list ]
+}
+
+and 'dns t
+
+and elt = {
+    sender: Colombe.Reverse_path.t
+  ; recipients: recipients
+  ; data: string Lwt_stream.t
+  ; policies: policy list
+  ; id: Mrmime.MessageID.t
+}
+
+and pool = {pool: 'a. (resource -> 'a Lwt.t) -> 'a Lwt.t}
 and resource = bytes * bytes * (char, Bigarray.int8_unsigned_elt) Ke.Rke.t
 and 'a push = 'a option -> unit
 and policy = [ `Ignore ]
 
 module Make
-  (Clock : Mirage_clock.PCLOCK)
-  (Stack : Tcpip.Stack.V4V6)
-  (Happy_eyeballs : Happy_eyeballs_mirage.S with type flow = Stack.TCP.flow) : sig
+    (Clock : Mirage_clock.PCLOCK)
+    (Stack : Tcpip.Stack.V4V6)
+    (Happy_eyeballs : Happy_eyeballs_mirage.S with type flow = Stack.TCP.flow) : sig
   val v :
        resolver:'dns Ptt_common.resolver
     -> ?pool:pool
File "lib/ptt_map.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_map.ml b/_build/default/lib/.formatted/ptt_map.ml
index 2a7e2be..8aa36a6 100644
--- a/_build/default/lib/ptt_map.ml
+++ b/_build/default/lib/.formatted/ptt_map.ml
@@ -8,9 +8,11 @@ module By_domain = Map.Make (struct
   let compare = Domain_name.compare
 end)
 
-type t =
-  { postmaster: Emile.mailbox
-  ; map: (local, Colombe.Forward_path.t list) Hashtbl.t }
+type t = {
+    postmaster: Emile.mailbox
+  ; map: (local, Colombe.Forward_path.t list) Hashtbl.t
+}
+
 and local = [ `Dot_string of string list | `String of string ]
 
 let postmaster {postmaster; _} = postmaster
@@ -19,12 +21,12 @@ let empty ~postmaster = {postmaster; map= Hashtbl.create 256}
 let add ~local destination t =
   match Colombe_emile.to_forward_path destination with
   | Error (`Msg err) -> invalid_arg err
-  | Ok destination ->
+  | Ok destination -> (
     match Hashtbl.find_opt t.map local with
     | Some vs ->
-      if not (List.exists (Colombe.Forward_path.equal destination) vs)
-      then Hashtbl.replace t.map local (destination :: vs)
-    | None -> Hashtbl.add t.map local [ destination ]
+      if not (List.exists (Colombe.Forward_path.equal destination) vs) then
+        Hashtbl.replace t.map local (destination :: vs)
+    | None -> Hashtbl.add t.map local [destination])
 
 let exists_as_sender sender ~info t =
   match sender with
@@ -34,11 +36,9 @@ let exists_as_sender sender ~info t =
     && Hashtbl.mem t.map local
 
 let recipients ~local {map; _} =
-  Hashtbl.find_opt map local
-  |> Option.value ~default:[]
+  Hashtbl.find_opt map local |> Option.value ~default:[]
 
 let all t = Hashtbl.fold (fun _ -> List.rev_append) t.map []
-
 let ( $ ) f g x = f (g x)
 
 module Set = Set.Make (Colombe.Forward_path)
@@ -46,20 +46,22 @@ module Set = Set.Make (Colombe.Forward_path)
 let expand ~info t recipients =
   let open Colombe in
   let open Forward_path in
-  List.map (function
-    | Postmaster ->
-      (Result.to_option $ Colombe_emile.to_forward_path) t.postmaster
-      |> Option.value ~default:Postmaster
-      |> (Fun.flip List.cons [])
-    | Domain domain as recipient ->
-      if Domain.equal domain info.Ptt_common.domain
-      then all t
-      else [ recipient ]
-    | Forward_path { Path.local; domain; _ } as recipient ->
-      if Domain.equal domain info.Ptt_common.domain
-      then match Hashtbl.find_opt t.map local with
-        | Some recipients -> recipients
-        | None -> []
-      else [ recipient ]) recipients
+  List.map
+    (function
+      | Postmaster ->
+        (Result.to_option $ Colombe_emile.to_forward_path) t.postmaster
+        |> Option.value ~default:Postmaster
+        |> Fun.flip List.cons []
+      | Domain domain as recipient ->
+        if Domain.equal domain info.Ptt_common.domain then all t
+        else [recipient]
+      | Forward_path {Path.local; domain; _} as recipient ->
+        if Domain.equal domain info.Ptt_common.domain then
+          match Hashtbl.find_opt t.map local with
+          | Some recipients -> recipients
+          | None -> []
+        else [recipient])
+    recipients
   |> List.concat
-  |> Set.of_list |> Set.elements
+  |> Set.of_list
+  |> Set.elements
File "lib/relay.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/relay.mli b/_build/default/lib/.formatted/relay.mli
index 4ab99b0..1508112 100644
--- a/_build/default/lib/relay.mli
+++ b/_build/default/lib/.formatted/relay.mli
@@ -1,15 +1,15 @@
 open Rresult
 
-module Make
-    (Stack : Tcpip.Stack.V4V6) : sig
+module Make (Stack : Tcpip.Stack.V4V6) : sig
   type server
 
-  type info = SMTP.info =
-    { domain: Colombe.Domain.t
+  type info = SMTP.info = {
+      domain: Colombe.Domain.t
     ; ipaddr: Ipaddr.t
     ; tls: Tls.Config.server option
     ; zone: Mrmime.Date.Zone.t
-    ; size: int64 }
+    ; size: int64
+  }
 
   val info : server -> info
 
@@ -19,7 +19,9 @@ module Make
 
   val create :
        info:info
-    -> server * (Messaged.key * string Lwt_stream.t) Lwt_stream.t * (unit -> unit)
+    -> server
+       * (Messaged.key * string Lwt_stream.t) Lwt_stream.t
+       * (unit -> unit)
 
   val accept :
        ?encoder:(unit -> bytes)
File "lib/ptt_fake_dns.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_fake_dns.ml b/_build/default/lib/.formatted/ptt_fake_dns.ml
index 7584713..44a3b3b 100644
--- a/_build/default/lib/ptt_fake_dns.ml
+++ b/_build/default/lib/.formatted/ptt_fake_dns.ml
@@ -1,61 +1,111 @@
 let msgf fmt = Fmt.kstr (fun msg -> `Msg msg) fmt
 
-module Make (Destination : sig val ipaddr : Ipaddr.t end) = struct
+module Make (Destination : sig
+  val ipaddr : Ipaddr.t
+end) =
+struct
   module Transport = struct
     type context = unit
     type stack = unit
     type t = unit
     type 'a io = 'a Lwt.t
+
     type io_addr =
-      [ `Plaintext of Ipaddr.t * int 
+      [ `Plaintext of Ipaddr.t * int
       | `Tls of Tls.Config.client * Ipaddr.t * int ]
-  
+
     let create ?nameservers:_ ~timeout:_ _ = assert false
     let nameservers _ = `Tcp, []
     let rng _ = String.empty
     let clock _ = 0L
-    let connect _ = Lwt.return_error (msgf "Ptt_fake_dns.Transport.connect: not implemented")
-    let send_recv _ _ = Lwt.return_error (msgf "Ptt_fake_dns.Transport.send_Recv: not implemented")
+
+    let connect _ =
+      Lwt.return_error (msgf "Ptt_fake_dns.Transport.connect: not implemented")
+
+    let send_recv _ _ =
+      Lwt.return_error
+        (msgf "Ptt_fake_dns.Transport.send_Recv: not implemented")
+
     let close _ = Lwt.return_unit
     let bind = Lwt.bind
     let lift = Lwt.return
     let happy_eyeballs _ = assert false
   end
-  
+
   type happy_eyeballs = unit
-  
+
   include Dns_client.Make (Transport)
-  
+
   (* NOTE(dinosaure): [ptt] only uses [getaddrinfo], [gethostbyname] &
      [gethostbyname6]. The rest is useless. *)
-  
-  let getaddrinfo
-    : type a. t -> a Dns.Rr_map.key -> 'x Domain_name.t -> (a, [> `Msg of string ]) result Lwt.t
-    = fun _ record domain_name -> match record, Domain_name.host domain_name with
-    | Dns.Rr_map.Mx, Ok mail_exchange -> Lwt.return_ok (0l, Dns.Rr_map.Mx_set.singleton { Dns.Mx.preference= 0; mail_exchange; })
-    | _ -> Lwt.return_error (msgf "Impossible to get %a from %a" Dns.Rr_map.ppk Dns.Rr_map.(K record) Domain_name.pp domain_name)
-  
-  let gethostbyname _t domain_name = match Destination.ipaddr with
+
+  let getaddrinfo :
+      type a.
+         t
+      -> a Dns.Rr_map.key
+      -> 'x Domain_name.t
+      -> (a, [> `Msg of string ]) result Lwt.t =
+   fun _ record domain_name ->
+    match record, Domain_name.host domain_name with
+    | Dns.Rr_map.Mx, Ok mail_exchange ->
+      Lwt.return_ok
+        (0l, Dns.Rr_map.Mx_set.singleton {Dns.Mx.preference= 0; mail_exchange})
+    | _ ->
+      Lwt.return_error
+        (msgf "Impossible to get %a from %a" Dns.Rr_map.ppk
+           Dns.Rr_map.(K record)
+           Domain_name.pp domain_name)
+
+  let gethostbyname _t domain_name =
+    match Destination.ipaddr with
     | Ipaddr.V4 ipv4 -> Lwt.return_ok ipv4
     | _ -> Lwt.return_error (msgf "%a not found" Domain_name.pp domain_name)
-  
-  let gethostbyname6 _t domain_name = match Destination.ipaddr with
+
+  let gethostbyname6 _t domain_name =
+    match Destination.ipaddr with
     | Ipaddr.V6 ipv6 -> Lwt.return_ok ipv6
     | _ -> Lwt.return_error (msgf "%a not found" Domain_name.pp domain_name)
-  
-  let get_resource_record
-    : type a. t -> a Dns.Rr_map.key -> 'x Domain_name.t -> (a, [> `Msg of string | `No_data of [ `raw ] Domain_name.t * Dns.Soa.t | `No_domain of [ `raw ] Domain_name.t * Dns.Soa.t ]) result Lwt.t
-    = fun _t record domain_name -> match record, Domain_name.host domain_name with
-    | Dns.Rr_map.Mx, Ok mail_exchange -> Lwt.return_ok (0l, Dns.Rr_map.Mx_set.singleton { Dns.Mx.preference= 0; mail_exchange; })
-    | _ -> Lwt.return_error (msgf "Impossible to get %a from %a" Dns.Rr_map.ppk Dns.Rr_map.(K record) Domain_name.pp domain_name)
-  
-  let get_raw_reply
-    : type a. t -> a Dns.Rr_map.key -> 'x Domain_name.t -> (Dns.Packet.reply, [> `Msg of string | `Partial ]) result Lwt.t
-    = fun _t _record _domain_name -> Lwt.return_error (msgf "Impossible to get %a from %a" Dns.Rr_map.ppk Dns.Rr_map.(K _record) Domain_name.pp _domain_name)
-  
-  let nameserver_of_string _ = Error (msgf "Ptt_fake_dns.nameserver_of_string: not implemented")
+
+  let get_resource_record :
+      type a.
+         t
+      -> a Dns.Rr_map.key
+      -> 'x Domain_name.t
+      -> ( a
+         , [> `Msg of string
+           | `No_data of [ `raw ] Domain_name.t * Dns.Soa.t
+           | `No_domain of [ `raw ] Domain_name.t * Dns.Soa.t ] )
+         result
+         Lwt.t =
+   fun _t record domain_name ->
+    match record, Domain_name.host domain_name with
+    | Dns.Rr_map.Mx, Ok mail_exchange ->
+      Lwt.return_ok
+        (0l, Dns.Rr_map.Mx_set.singleton {Dns.Mx.preference= 0; mail_exchange})
+    | _ ->
+      Lwt.return_error
+        (msgf "Impossible to get %a from %a" Dns.Rr_map.ppk
+           Dns.Rr_map.(K record)
+           Domain_name.pp domain_name)
+
+  let get_raw_reply :
+      type a.
+         t
+      -> a Dns.Rr_map.key
+      -> 'x Domain_name.t
+      -> (Dns.Packet.reply, [> `Msg of string | `Partial ]) result Lwt.t =
+   fun _t _record _domain_name ->
+    Lwt.return_error
+      (msgf "Impossible to get %a from %a" Dns.Rr_map.ppk
+         Dns.Rr_map.(K _record)
+         Domain_name.pp _domain_name)
+
+  let nameserver_of_string _ =
+    Error (msgf "Ptt_fake_dns.nameserver_of_string: not implemented")
+
   let nameservers _ = `Tcp, []
   let transport _ = ()
+
   let connect ?cache_size ?edns ?nameservers:_ ?timeout () =
     create ?cache_size ?edns ~nameservers:(`Tcp, []) ?timeout () |> Lwt.return
 end
File "lib/lipap.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/lipap.ml b/_build/default/lib/.formatted/lipap.ml
index 0d7420c..b5fc119 100644
--- a/_build/default/lib/lipap.ml
+++ b/_build/default/lib/.formatted/lipap.ml
@@ -5,7 +5,7 @@ let src = Logs.Src.create "ptt.lipap"
 
 module Log : Logs.LOG = (val Logs.src_log src)
 
-let ( $ ) f g = fun x -> f (g x)
+let ( $ ) f g x = f (g x)
 
 module Make
     (Time : Mirage_time.S)
@@ -22,8 +22,8 @@ struct
   let resolver =
     let open Ptt_common in
     let getmxbyname dns domain_name =
-      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name
-      >|= Result.map snd in
+      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name >|= Result.map snd
+    in
     let gethostbyname dns domain_name =
       let ipv4 =
         Dns_client.gethostbyname dns domain_name
@@ -31,12 +31,12 @@ struct
       let ipv6 =
         Dns_client.gethostbyname6 dns domain_name
         >|= Result.map (fun ipv6 -> Ipaddr.V6 ipv6) in
-      Lwt.all [ ipv4; ipv6 ] >|= function
-      | [ _; (Ok _ as ipv6) ] -> ipv6
-      | [ (Ok _ as ipv4); Error _ ] -> ipv4
-      | [ (Error _ as err); _ ] -> err
+      Lwt.all [ipv4; ipv6] >|= function
+      | [_; (Ok _ as ipv6)] -> ipv6
+      | [(Ok _ as ipv4); Error _] -> ipv4
+      | [(Error _ as err); _] -> err
       | [] | [_] | _ :: _ :: _ -> assert false in
-    { getmxbyname; gethostbyname }
+    {getmxbyname; gethostbyname}
 
   let server_job ~pool ?stop ~port random hash stack dns server close =
     let handler flow =
@@ -45,8 +45,8 @@ struct
         (fun () ->
           Lwt_pool.use pool @@ fun (encoder, decoder, _) ->
           Submission.accept ~encoder:(Fun.const encoder)
-            ~decoder:(Fun.const decoder) ~ipaddr flow dns resolver
-            random hash server
+            ~decoder:(Fun.const decoder) ~ipaddr flow dns resolver random hash
+            server
           >|= R.reword_error (R.msgf "%a" Submission.pp_error))
         (fun () -> Stack.TCP.close flow)
       >>= function
@@ -55,9 +55,9 @@ struct
         Log.err (fun m -> m "<%a:%d> %s" Ipaddr.pp ipaddr port err);
         Lwt.return () in
     Server.init ~port stack >>= fun service ->
-    Server.serve_when_ready ?stop ~handler service
-    |> fun (`Initialized job) ->
-    let job = job >|= close in job
+    Server.serve_when_ready ?stop ~handler service |> fun (`Initialized job) ->
+    let job = job >|= close in
+    job
 
   let logic_job ~info map (ic, oc) =
     let rec go () =
@@ -70,24 +70,40 @@ struct
         let recipients = Ptt_map.expand ~info map recipients in
         let recipients = Ptt_aggregate.to_recipients ~info recipients in
         let id = Ptt_common.id_to_messageID ~info (Ptt.Messaged.id key) in
-        let elts = List.map (fun recipients ->
-          (* TODO(dinosaure): Can we use multiple MAIL FROM to keep the original
-             sender? We actually force <ptt.mti-gf@info.Ptt_common.domain> to be
-             SPF-valid in front of SMTP servers even if we are not the original
-             author of the email. The original author is kept into the [Sender]
-             field of the email which is unchanged. *)
-          { Ptt_sendmail.sender
-          ; recipients
-          ; data= Lwt_stream.clone stream
-          ; policies= []
-          ; id }) recipients in
+        let elts =
+          List.map
+            (fun recipients ->
+              (* TODO(dinosaure): Can we use multiple MAIL FROM to keep the original
+                 sender? We actually force <ptt.mti-gf@info.Ptt_common.domain> to be
+                 SPF-valid in front of SMTP servers even if we are not the original
+                 author of the email. The original author is kept into the [Sender]
+                 field of the email which is unchanged. *)
+              {
+                Ptt_sendmail.sender
+              ; recipients
+              ; data= Lwt_stream.clone stream
+              ; policies= []
+              ; id
+              })
+            recipients in
         List.iter (oc $ Option.some) elts;
-      Lwt.pause () >>= go in
+        Lwt.pause () >>= go in
     go ()
 
-  let job  ?(limit = 20) ?stop ~locals ~port ~tls ~info
-    random hash stack dns he
-    authenticator mechanisms =
+  let job
+      ?(limit = 20)
+      ?stop
+      ~locals
+      ~port
+      ~tls
+      ~info
+      random
+      hash
+      stack
+      dns
+      he
+      authenticator
+      mechanisms =
     let pool0 =
       Lwt_pool.create limit @@ fun () ->
       let encoder = Bytes.create Colombe.Encoder.io_buffer_size in
@@ -100,12 +116,13 @@ struct
       let decoder = Bytes.create Colombe.Decoder.io_buffer_size in
       let queue = Ke.Rke.create ~capacity:0x1000 Bigarray.char in
       Lwt.return (encoder, decoder, queue) in
-    let pool1 =
-      { Ptt_sendmail.pool= fun fn -> Lwt_pool.use pool1 fn } in
-    let ic_server, stream0, close0 = Submission.create ~info ~authenticator mechanisms in
+    let pool1 = {Ptt_sendmail.pool= (fun fn -> Lwt_pool.use pool1 fn)} in
+    let ic_server, stream0, close0 =
+      Submission.create ~info ~authenticator mechanisms in
     let oc_server, push0 = Sendmail.v ~resolver ~pool:pool1 ~info tls in
     Lwt.join
-      [ server_job ~pool:pool0 ?stop ~port random hash stack dns ic_server close0
-      ; logic_job ~info locals (stream0, push0)
-      ; Sendmail.job dns he oc_server ]
+      [
+        server_job ~pool:pool0 ?stop ~port random hash stack dns ic_server close0
+      ; logic_job ~info locals (stream0, push0); Sendmail.job dns he oc_server
+      ]
 end
File "lib/hm.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/hm.ml b/_build/default/lib/.formatted/hm.ml
index 037a4ea..457b124 100644
--- a/_build/default/lib/hm.ml
+++ b/_build/default/lib/.formatted/hm.ml
@@ -5,7 +5,7 @@ let src = Logs.Src.create "ptt.hm"
 
 module Log : Logs.LOG = (val Logs.src_log src)
 
-let ( $ ) f g = fun x -> f (g x)
+let ( $ ) f g x = f (g x)
 
 module Make
     (Time : Mirage_time.S)
@@ -23,8 +23,8 @@ struct
   let resolver =
     let open Ptt_common in
     let getmxbyname dns domain_name =
-      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name
-      >|= Result.map snd in
+      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name >|= Result.map snd
+    in
     let gethostbyname dns domain_name =
       let ipv4 =
         Dns_client.gethostbyname dns domain_name
@@ -32,12 +32,12 @@ struct
       let ipv6 =
         Dns_client.gethostbyname6 dns domain_name
         >|= Result.map (fun ipv6 -> Ipaddr.V6 ipv6) in
-      Lwt.all [ ipv4; ipv6 ] >|= function
-      | [ _; (Ok _ as ipv6) ] -> ipv6
-      | [ (Ok _ as ipv4); Error _ ] -> ipv4
-      | [ (Error _ as err); _ ] -> err
+      Lwt.all [ipv4; ipv6] >|= function
+      | [_; (Ok _ as ipv6)] -> ipv6
+      | [(Ok _ as ipv4); Error _] -> ipv4
+      | [(Error _ as err); _] -> err
       | [] | [_] | _ :: _ :: _ -> assert false in
-    { getmxbyname; gethostbyname }
+    {getmxbyname; gethostbyname}
 
   let server_job ~pool ?stop ~port stack dns server close =
     let handler flow =
@@ -58,15 +58,15 @@ struct
         Log.err (fun m -> m "<%a:%d> %s" Ipaddr.pp ipaddr port err);
         Lwt.return () in
     Server.init ~port stack >>= fun service ->
-    Server.serve_when_ready ?stop ~handler service
-    |> fun (`Initialized job) ->
-    let job = job >|= close in job
+    Server.serve_when_ready ?stop ~handler service |> fun (`Initialized job) ->
+    let job = job >|= close in
+    job
 
   let stream_of_field (field_name : Mrmime.Field_name.t) unstrctrd =
     Lwt_stream.of_list
-      [ (field_name :> string)
-      ; ": "
-      ; Unstrctrd.to_utf_8_string unstrctrd; "\r\n" ]
+      [
+        (field_name :> string); ": "; Unstrctrd.to_utf_8_string unstrctrd; "\r\n"
+      ]
 
   let logic_job ~info map (ic, oc) dns =
     let rec go () =
@@ -75,9 +75,8 @@ struct
       | Some (key, stream) ->
         let sender, _ = Ptt.Messaged.from key in
         let ctx =
-          Uspf.empty
-          |> Uspf.with_ip (Ptt.Messaged.ipaddr key)
-          |> fun ctx -> Option.fold ~none:ctx
+          Uspf.empty |> Uspf.with_ip (Ptt.Messaged.ipaddr key) |> fun ctx ->
+          Option.fold ~none:ctx
             ~some:(fun sender -> Uspf.with_sender (`MAILFROM sender) ctx)
             sender in
         let verify () =
@@ -88,13 +87,16 @@ struct
             Lwt.return stream
           | Ok record ->
             Uspf_client.check ~ctx dns record >>= fun result ->
-            let receiver = match info.Ptt_common.domain with
+            let receiver =
+              match info.Ptt_common.domain with
               | Colombe.Domain.Domain ds -> `Domain ds
               | IPv4 ipv4 -> `Addr (Emile.IPv4 ipv4)
               | IPv6 ipv6 -> `Addr (Emile.IPv6 ipv6)
               | Extension (k, v) -> `Addr (Emile.Ext (k, v)) in
             let field_name, unstrctrd = Uspf.to_field ~ctx ~receiver result in
-            let stream = Lwt_stream.append (stream_of_field field_name unstrctrd) stream in
+            let stream =
+              Lwt_stream.append (stream_of_field field_name unstrctrd) stream
+            in
             Lwt.return stream in
         verify () >>= fun stream ->
         let recipients = Ptt.Messaged.recipients key in
@@ -102,12 +104,17 @@ struct
         let recipients = Ptt_map.expand ~info map recipients in
         let recipients = Ptt_aggregate.to_recipients ~info recipients in
         let id = Ptt_common.id_to_messageID ~info (Ptt.Messaged.id key) in
-        let elts = List.map (fun recipients ->
-          { Ptt_sendmail.sender
-          ; recipients
-          ; data= Lwt_stream.clone stream
-          ; policies= []
-          ; id }) recipients in
+        let elts =
+          List.map
+            (fun recipients ->
+              {
+                Ptt_sendmail.sender
+              ; recipients
+              ; data= Lwt_stream.clone stream
+              ; policies= []
+              ; id
+              })
+            recipients in
         List.iter (oc $ Option.some) elts;
         Lwt.pause () >>= go in
     go ()
@@ -125,12 +132,13 @@ struct
       let decoder = Bytes.create Colombe.Decoder.io_buffer_size in
       let queue = Ke.Rke.create ~capacity:0x1000 Bigarray.char in
       Lwt.return (encoder, decoder, queue) in
-    let pool1 =
-      { Ptt_sendmail.pool= fun fn -> Lwt_pool.use pool1 fn } in
+    let pool1 = {Ptt_sendmail.pool= (fun fn -> Lwt_pool.use pool1 fn)} in
     let ic_server, stream0, close0 = Verifier.create ~info in
     let oc_server, push0 = Sendmail.v ~resolver ~pool:pool1 ~info tls in
     Lwt.join
-      [ server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
+      [
+        server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
       ; logic_job ~info locals (stream0, push0) dns
-      ; Sendmail.job dns he oc_server ]
+      ; Sendmail.job dns he oc_server
+      ]
 end
File "lib/mti_gf.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/mti_gf.ml b/_build/default/lib/.formatted/mti_gf.ml
index 6c06547..dfa064e 100644
--- a/_build/default/lib/mti_gf.ml
+++ b/_build/default/lib/.formatted/mti_gf.ml
@@ -5,7 +5,7 @@ let src = Logs.Src.create "ptt.mti-gf"
 
 module Log : Logs.LOG = (val Logs.src_log src)
 
-let ( $ ) f g = fun x -> f (g x)
+let ( $ ) f g x = f (g x)
 
 module Make
     (Time : Mirage_time.S)
@@ -22,8 +22,8 @@ struct
   let resolver =
     let open Ptt_common in
     let getmxbyname dns domain_name =
-      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name
-      >|= Result.map snd in
+      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name >|= Result.map snd
+    in
     let gethostbyname dns domain_name =
       let ipv4 =
         Dns_client.gethostbyname dns domain_name
@@ -31,12 +31,12 @@ struct
       let ipv6 =
         Dns_client.gethostbyname6 dns domain_name
         >|= Result.map (fun ipv6 -> Ipaddr.V6 ipv6) in
-      Lwt.all [ ipv4; ipv6 ] >|= function
-      | [ _; (Ok _ as ipv6) ] -> ipv6
-      | [ (Ok _ as ipv4); Error _ ] -> ipv4
-      | [ (Error _ as err); _ ] -> err
+      Lwt.all [ipv4; ipv6] >|= function
+      | [_; (Ok _ as ipv6)] -> ipv6
+      | [(Ok _ as ipv4); Error _] -> ipv4
+      | [(Error _ as err); _] -> err
       | [] | [_] | _ :: _ :: _ -> assert false in
-    { getmxbyname; gethostbyname }
+    {getmxbyname; gethostbyname}
 
   let server_job ~pool ?stop ~port stack dns server close =
     let handler flow =
@@ -51,17 +51,18 @@ struct
       >>= function
       | Ok () -> Lwt.return ()
       | Error (`Msg err) ->
-        Log.err (fun m -> m "<%a:%d> raised an error: %s" Ipaddr.pp ipaddr port err);
+        Log.err (fun m ->
+            m "<%a:%d> raised an error: %s" Ipaddr.pp ipaddr port err);
         Lwt.return () in
     Server.init ~port stack >>= fun service ->
-    Server.serve_when_ready ?stop ~handler service
-    |> fun (`Initialized job) ->
-    let job = job >|= close in job
+    Server.serve_when_ready ?stop ~handler service |> fun (`Initialized job) ->
+    let job = job >|= close in
+    job
 
   let logic_job ~info map (ic, oc) =
     let sender =
-      let local = `Dot_string [ "ptt"; "mti-gf" ] in
-      Some (Colombe.Path.{ local; domain= info.Ptt_common.domain; rest= [] }) in
+      let local = `Dot_string ["ptt"; "mti-gf"] in
+      Some Colombe.Path.{local; domain= info.Ptt_common.domain; rest= []} in
     let rec go () =
       Lwt_stream.get ic >>= function
       | None -> oc None; Lwt.return_unit
@@ -71,17 +72,22 @@ struct
         let recipients = Ptt_map.expand ~info map recipients in
         let recipients = Ptt_aggregate.to_recipients ~info recipients in
         let id = Ptt_common.id_to_messageID ~info (Ptt.Messaged.id key) in
-        let elts = List.map (fun recipients ->
-          (* TODO(dinosaure): Can we use multiple MAIL FROM to keep the original
-             sender? We actually force <ptt.mti-gf@info.Ptt_common.domain> to be
-             SPF-valid in front of SMTP servers even if we are not the original
-             author of the email. The original author is kept into the [Sender]
-             field of the email which is unchanged. *)
-          { Ptt_sendmail.sender
-          ; recipients
-          ; data= Lwt_stream.clone stream
-          ; policies= []
-          ; id }) recipients in
+        let elts =
+          List.map
+            (fun recipients ->
+              (* TODO(dinosaure): Can we use multiple MAIL FROM to keep the original
+                 sender? We actually force <ptt.mti-gf@info.Ptt_common.domain> to be
+                 SPF-valid in front of SMTP servers even if we are not the original
+                 author of the email. The original author is kept into the [Sender]
+                 field of the email which is unchanged. *)
+              {
+                Ptt_sendmail.sender
+              ; recipients
+              ; data= Lwt_stream.clone stream
+              ; policies= []
+              ; id
+              })
+            recipients in
         List.iter (oc $ Option.some) elts;
         Lwt.pause () >>= go in
     go ()
@@ -99,12 +105,12 @@ struct
       let decoder = Bytes.create 0x7ff in
       let queue = Ke.Rke.create ~capacity:0x800 Bigarray.char in
       Lwt.return (encoder, decoder, queue) in
-    let pool1 =
-      { Ptt_sendmail.pool= fun fn -> Lwt_pool.use pool1 fn } in
+    let pool1 = {Ptt_sendmail.pool= (fun fn -> Lwt_pool.use pool1 fn)} in
     let ic_server, stream0, close0 = Relay.create ~info in
     let oc_server, push0 = Sendmail.v ~resolver ~pool:pool1 ~info tls in
     Lwt.join
-      [ server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
-      ; logic_job ~info locals (stream0, push0)
-      ; Sendmail.job dns he oc_server ]
+      [
+        server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
+      ; logic_job ~info locals (stream0, push0); Sendmail.job dns he oc_server
+      ]
 end
File "lib/nec.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/nec.ml b/_build/default/lib/.formatted/nec.ml
index a64a644..47f76c0 100644
--- a/_build/default/lib/nec.ml
+++ b/_build/default/lib/.formatted/nec.ml
@@ -5,7 +5,7 @@ let src = Logs.Src.create "ptt.nec"
 
 module Log : Logs.LOG = (val Logs.src_log src)
 
-let ( $ ) f g = fun x -> f (g x)
+let ( $ ) f g x = f (g x)
 
 module Make
     (Time : Mirage_time.S)
@@ -22,8 +22,8 @@ struct
   let resolver =
     let open Ptt_common in
     let getmxbyname dns domain_name =
-      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name
-      >|= Result.map snd in
+      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name >|= Result.map snd
+    in
     let gethostbyname dns domain_name =
       let ipv4 =
         Dns_client.gethostbyname dns domain_name
@@ -31,12 +31,12 @@ struct
       let ipv6 =
         Dns_client.gethostbyname6 dns domain_name
         >|= Result.map (fun ipv6 -> Ipaddr.V6 ipv6) in
-      Lwt.all [ ipv4; ipv6 ] >|= function
-      | [ _; (Ok _ as ipv6) ] -> ipv6
-      | [ (Ok _ as ipv4); Error _ ] -> ipv4
-      | [ (Error _ as err); _ ] -> err
+      Lwt.all [ipv4; ipv6] >|= function
+      | [_; (Ok _ as ipv6)] -> ipv6
+      | [(Ok _ as ipv4); Error _] -> ipv4
+      | [(Error _ as err); _] -> err
       | [] | [_] | _ :: _ :: _ -> assert false in
-    { getmxbyname; gethostbyname }
+    {getmxbyname; gethostbyname}
 
   let server_job ~pool ?stop ~port stack dns server close =
     let handler flow =
@@ -55,9 +55,9 @@ struct
         Log.err (fun m -> m "<%a:%d> %s" Ipaddr.pp ipaddr port err);
         Lwt.return () in
     Server.init ~port stack >>= fun service ->
-    Server.serve_when_ready ?stop ~handler service
-    |> fun (`Initialized job) ->
-    let job = job >|= close in job
+    Server.serve_when_ready ?stop ~handler service |> fun (`Initialized job) ->
+    let job = job >|= close in
+    job
 
   let logic_job ~info map (ic, oc) (private_key, dkim) =
     let rec go () =
@@ -67,34 +67,55 @@ struct
         let sign_and_transmit () =
           Lwt.catch (fun () ->
               let consumer =
-                let stream = Lwt_stream.map (fun str -> str, 0, String.length str) stream in
+                let stream =
+                  Lwt_stream.map (fun str -> str, 0, String.length str) stream
+                in
                 fun () -> Lwt_stream.get stream in
               Dkim_mirage.sign ~key:private_key ~newline:Dkim.CRLF consumer dkim
               >>= fun (_signed, consumer) ->
               let stream = Lwt_stream.from consumer in
-              let stream = Lwt_stream.map (fun (str, off, len) -> String.sub str off len) stream in
+              let stream =
+                Lwt_stream.map
+                  (fun (str, off, len) -> String.sub str off len)
+                  stream in
               let sender, _ = Ptt.Messaged.from key in
               let recipients = Ptt.Messaged.recipients key in
               let recipients = List.map fst recipients in
               let recipients = Ptt_map.expand ~info map recipients in
               let recipients = Ptt_aggregate.to_recipients ~info recipients in
               let id = Ptt_common.id_to_messageID ~info (Ptt.Messaged.id key) in
-              let elts = List.map (fun recipients ->
-                { Ptt_sendmail.sender
-                ; recipients
-                ; data= Lwt_stream.clone stream
-                ; policies= []
-                ; id }) recipients in
+              let elts =
+                List.map
+                  (fun recipients ->
+                    {
+                      Ptt_sendmail.sender
+                    ; recipients
+                    ; data= Lwt_stream.clone stream
+                    ; policies= []
+                    ; id
+                    })
+                  recipients in
               List.iter (oc $ Option.some) elts;
               Lwt.return_unit)
           @@ fun exn ->
-          Log.err (fun m -> m "Impossible to sign the incoming email: %S" (Printexc.to_string exn));
+          Log.err (fun m ->
+              m "Impossible to sign the incoming email: %S"
+                (Printexc.to_string exn));
           Lwt.return_unit in
         sign_and_transmit () >>= Lwt.pause >>= go in
     go ()
 
-  let job ?(limit = 20) ?stop ~locals ~port ~tls ~info
-    stack dns he (private_key, dkim) =
+  let job
+      ?(limit = 20)
+      ?stop
+      ~locals
+      ~port
+      ~tls
+      ~info
+      stack
+      dns
+      he
+      (private_key, dkim) =
     let pool0 =
       Lwt_pool.create limit @@ fun () ->
       let encoder = Bytes.create Colombe.Encoder.io_buffer_size in
@@ -107,12 +128,13 @@ struct
       let decoder = Bytes.create Colombe.Decoder.io_buffer_size in
       let queue = Ke.Rke.create ~capacity:0x1000 Bigarray.char in
       Lwt.return (encoder, decoder, queue) in
-    let pool1 =
-      { Ptt_sendmail.pool= fun fn -> Lwt_pool.use pool1 fn } in
+    let pool1 = {Ptt_sendmail.pool= (fun fn -> Lwt_pool.use pool1 fn)} in
     let ic_server, stream0, close0 = Signer.create ~info in
     let oc_server, push0 = Sendmail.v ~resolver ~pool:pool1 ~info tls in
     Lwt.join
-      [ server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
+      [
+        server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
       ; logic_job ~info locals (stream0, push0) (private_key, dkim)
-      ; Sendmail.job dns he oc_server ]
+      ; Sendmail.job dns he oc_server
+      ]
 end
File "lib/ptt_aggregate.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_aggregate.ml b/_build/default/lib/.formatted/ptt_aggregate.ml
index 2a55301..955fc4a 100644
--- a/_build/default/lib/ptt_aggregate.ml
+++ b/_build/default/lib/.formatted/ptt_aggregate.ml
@@ -2,8 +2,7 @@ let src = Logs.Src.create "ptt.aggregate"
 
 module Log = (val Logs.src_log src)
 
-let ( <$> ) f g = fun x -> match g x with
-  | Ok x -> f x | Error _ as err -> err
+let ( <$> ) f g x = match g x with Ok x -> f x | Error _ as err -> err
 
 module By_domain = Map.Make (struct
   type t = [ `host ] Domain_name.t
@@ -44,31 +43,45 @@ let aggregate_by_domains ~info =
   let open Colombe in
   let open Forward_path in
   let fold (by_domains, by_ipaddrs) = function
-    | Postmaster ->
-      begin match info.Ptt_common.domain with
+    | Postmaster -> begin
+      match info.Ptt_common.domain with
       | Colombe.Domain.(IPv4 _ | IPv6 _ | Extension _) ->
-        Log.err (fun m -> m "The SMTP server domain is not a domain-name, impossible to add the postmaster as a recipient");
+        Log.err (fun m ->
+            m
+              "The SMTP server domain is not a domain-name, impossible to add \
+               the postmaster as a recipient");
         by_domains, by_ipaddrs
-      | Colombe.Domain.Domain ds ->
+      | Colombe.Domain.Domain ds -> (
         match Domain_name.(host <$> of_strings) ds with
         | Ok domain -> add_by_domain ~domain `Postmaster by_domains, by_ipaddrs
         | Error (`Msg _) ->
-          Log.err (fun m -> m "Invalid SMTP server domain, impossible to add the postmaster as a recipient");
-          by_domains, by_ipaddrs end
+          Log.err (fun m ->
+              m
+                "Invalid SMTP server domain, impossible to add the postmaster \
+                 as a recipient");
+          by_domains, by_ipaddrs)
+    end
     | Forward_path {Path.domain= Domain.Domain v; Path.local; _} as recipient ->
-      begin match Domain_name.(host <$> of_strings) v with
+      begin
+      match Domain_name.(host <$> of_strings) v with
       | Ok domain ->
         let local = Colombe_emile.of_local local in
         add_by_domain ~domain (`Some local) by_domains, by_ipaddrs
       | Error (`Msg msg) ->
-        Log.warn (fun m -> m "Invalid domain for %a, ignore it: %s" Forward_path.pp recipient msg);
-        by_domains, by_ipaddrs end
-    | Domain (Domain.Domain v) as recipient ->
-      begin match Domain_name.(host <$> of_strings) v with
+        Log.warn (fun m ->
+            m "Invalid domain for %a, ignore it: %s" Forward_path.pp recipient
+              msg);
+        by_domains, by_ipaddrs
+    end
+    | Domain (Domain.Domain v) as recipient -> begin
+      match Domain_name.(host <$> of_strings) v with
       | Ok domain -> add_by_domain ~domain `All by_domains, by_ipaddrs
       | Error (`Msg msg) ->
-        Log.warn (fun m -> m "Invalid domain for %a, ignore it: %s" Forward_path.pp recipient msg);
-        by_domains, by_ipaddrs end
+        Log.warn (fun m ->
+            m "Invalid domain for %a, ignore it: %s" Forward_path.pp recipient
+              msg);
+        by_domains, by_ipaddrs
+    end
     | Domain (Domain.IPv4 v4) ->
       by_domains, add_by_ipaddr (Ipaddr.V4 v4) `All by_ipaddrs
     | Domain (Domain.IPv6 v6) ->
@@ -79,19 +92,28 @@ let aggregate_by_domains ~info =
     | Forward_path {Path.domain= Domain.IPv6 v6; Path.local; _} ->
       let local = Colombe_emile.of_local local in
       by_domains, add_by_ipaddr (Ipaddr.V6 v6) (`Some local) by_ipaddrs
-    | Domain (Domain.Extension _)
-    | Forward_path {Path.domain= Domain.Extension _; _} as recipient ->
-      Log.warn (fun m -> m "We don't support domain extension, ignore %a" Forward_path.pp recipient);
+    | ( Domain (Domain.Extension _)
+      | Forward_path {Path.domain= Domain.Extension _; _} ) as recipient ->
+      Log.warn (fun m ->
+          m "We don't support domain extension, ignore %a" Forward_path.pp
+            recipient);
       by_domains, by_ipaddrs in
   List.fold_left fold (By_domain.empty, By_ipaddr.empty)
 
 let to_recipients ~info recipients =
   let by_domains, by_ipaddrs = aggregate_by_domains ~info recipients in
-  let by_domains = List.map (fun (domain, locals) ->
-    let domain = `Domain domain in
-    Ptt_sendmail.{ domain; locals }) (By_domain.bindings by_domains) in
-  let by_ipaddrs = List.map (fun (ipaddr, locals) ->
-    let domain = `Ipaddr ipaddr in
-    let locals = (locals :> [ `Some of Emile.local list | `Postmaster | `All]) in
-    Ptt_sendmail.{ domain; locals }) (By_ipaddr.bindings by_ipaddrs) in
+  let by_domains =
+    List.map
+      (fun (domain, locals) ->
+        let domain = `Domain domain in
+        Ptt_sendmail.{domain; locals})
+      (By_domain.bindings by_domains) in
+  let by_ipaddrs =
+    List.map
+      (fun (ipaddr, locals) ->
+        let domain = `Ipaddr ipaddr in
+        let locals =
+          (locals :> [ `Some of Emile.local list | `Postmaster | `All ]) in
+        Ptt_sendmail.{domain; locals})
+      (By_ipaddr.bindings by_ipaddrs) in
   List.rev_append by_domains by_ipaddrs
File "lib/ptt_common.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_common.ml b/_build/default/lib/.formatted/ptt_common.ml
index 0e3598c..5ae40f2 100644
--- a/_build/default/lib/ptt_common.ml
+++ b/_build/default/lib/.formatted/ptt_common.ml
@@ -2,91 +2,101 @@ let src = Logs.Src.create "ptt.common"
 
 module Log = (val Logs.src_log src)
 
-let ( <$> ) f g = fun x -> match g x with
-  | Ok x -> f x | Error _ as err -> err
+let ( <$> ) f g x = match g x with Ok x -> f x | Error _ as err -> err
 
 type mxs = Dns.Rr_map.Mx_set.t
 
 type ('dns, 'a) getmxbyname =
      'dns
   -> [ `host ] Domain_name.t
-  -> (mxs, [> `Msg of string ] as 'a) result Lwt.t
+  -> (mxs, ([> `Msg of string ] as 'a)) result Lwt.t
 
 type ('dns, 'a) gethostbyname =
      'dns
   -> [ `host ] Domain_name.t
-  -> (Ipaddr.t, [> `Msg of string ] as 'a) result Lwt.t
+  -> (Ipaddr.t, ([> `Msg of string ] as 'a)) result Lwt.t
 
-type 'dns resolver =
-  { getmxbyname : 'a. ('dns, 'a) getmxbyname
-  ; gethostbyname : 'a. ('dns, 'a) gethostbyname }
+type 'dns resolver = {
+    getmxbyname: 'a. ('dns, 'a) getmxbyname
+  ; gethostbyname: 'a. ('dns, 'a) gethostbyname
+}
 
-type info =
-  { domain: Colombe.Domain.t
+type info = {
+    domain: Colombe.Domain.t
   ; ipaddr: Ipaddr.t
   ; tls: Tls.Config.server option
   ; zone: Mrmime.Date.Zone.t
-  ; size: int64 }
+  ; size: int64
+}
 
 module Mxs = Mxs
 
 exception Extension_is_not_available of Colombe.Forward_path.t
 exception Invalid_recipients of Colombe.Forward_path.t
 
-module Set = Set.Make (struct type t = [ `host ] Domain_name.t let compare = Domain_name.compare end)
+module Set = Set.Make (struct
+  type t = [ `host ] Domain_name.t
+
+  let compare = Domain_name.compare
+end)
 
 let recipients_are_reachable ~info dns resolver recipients =
   let domains =
     let open Colombe in
-    List.fold_left (fun acc -> function
-      | Forward_path.Postmaster -> acc (* NOTE(dinosaure): we ourselves should be available *)
-      | Domain (Domain.IPv4 _ | Domain.IPv6 _)
-      | Forward_path { Path.domain= (Domain.IPv4 _ | Domain.IPv6 _); _ } -> acc
-      | Domain (Domain.Extension _)
-      | Forward_path { Path.domain= Domain.Extension _; _ } as value ->
+    List.fold_left
+      (fun acc -> function
+        | Forward_path.Postmaster ->
+          acc (* NOTE(dinosaure): we ourselves should be available *)
+        | Domain (Domain.IPv4 _ | Domain.IPv6 _)
+        | Forward_path {Path.domain= Domain.IPv4 _ | Domain.IPv6 _; _} ->
+          acc
+        | ( Domain (Domain.Extension _)
+          | Forward_path {Path.domain= Domain.Extension _; _} ) as value ->
           raise (Extension_is_not_available value)
-      | Domain (Domain.Domain domain)
-      | Forward_path { Path.domain= Domain.Domain domain; _ } as value ->
-          if Domain.equal (Domain.Domain domain) info.domain
-          then acc (* NOTE(dinosaure): we ourselves should be available *)
-          else match Domain_name.(host <$> of_strings) domain with
-          | Ok domain_name -> Set.add domain_name acc
-          | Error _ -> raise (Invalid_recipients value))
+        | ( Domain (Domain.Domain domain)
+          | Forward_path {Path.domain= Domain.Domain domain; _} ) as value -> (
+          if Domain.equal (Domain.Domain domain) info.domain then acc
+            (* NOTE(dinosaure): we ourselves should be available *)
+          else
+            match Domain_name.(host <$> of_strings) domain with
+            | Ok domain_name -> Set.add domain_name acc
+            | Error _ -> raise (Invalid_recipients value)))
       Set.empty recipients
     |> Set.elements in
   let ( let* ) = Lwt.bind in
-  let mail_exchange_are_reachable { Dns.Mx.mail_exchange; _ } =
+  let mail_exchange_are_reachable {Dns.Mx.mail_exchange; _} =
     let* result = resolver.gethostbyname dns mail_exchange in
-    match result with
-    | Ok _ -> Lwt.return true
-    | Error _ -> Lwt.return false in
+    match result with Ok _ -> Lwt.return true | Error _ -> Lwt.return false
+  in
   let domain_are_reachable domain =
     let* result = resolver.getmxbyname dns domain in
     match result with
     | Ok mxs ->
-        let lst = Dns.Rr_map.Mx_set.elements mxs in
-        let lst = List.sort Dns.Mx.compare lst in
-        Lwt_list.exists_p mail_exchange_are_reachable lst
+      let lst = Dns.Rr_map.Mx_set.elements mxs in
+      let lst = List.sort Dns.Mx.compare lst in
+      Lwt_list.exists_p mail_exchange_are_reachable lst
     | Error _ -> Lwt.return false in
   Lwt_list.for_all_p domain_are_reachable domains
 
 let recipients_are_reachable ~info dns resolver recipients =
   Lwt.catch (fun () -> recipients_are_reachable ~info dns resolver recipients)
   @@ function
-    | Extension_is_not_available recipient ->
-        Log.warn (fun m -> m "Someone tries to send an email to an \
-          extension: %a" Colombe.Forward_path.pp recipient);
-        Lwt.return false
-    | Invalid_recipients recipient ->
-        Log.warn (fun m -> m "%a's destination is unreachable"
+  | Extension_is_not_available recipient ->
+    Log.warn (fun m ->
+        m "Someone tries to send an email to an extension: %a"
           Colombe.Forward_path.pp recipient);
-        Lwt.return false
-    | exn -> Lwt.reraise exn
+    Lwt.return false
+  | Invalid_recipients recipient ->
+    Log.warn (fun m ->
+        m "%a's destination is unreachable" Colombe.Forward_path.pp recipient);
+    Lwt.return false
+  | exn -> Lwt.reraise exn
 
 let id_to_messageID ~info id =
-  let local = [ `Atom (Fmt.str "%016Lx" id) ] in
+  let local = [`Atom (Fmt.str "%016Lx" id)] in
   let open Colombe in
-  let domain = match info.domain with
+  let domain =
+    match info.domain with
     | Domain.Domain ds -> `Domain ds
     | Domain.IPv4 v4 ->
       let domain_name = Ipaddr.V4.to_domain_name v4 in
@@ -94,5 +104,6 @@ let id_to_messageID ~info id =
     | Domain.IPv6 v6 ->
       let domain_name = Ipaddr.V6.to_domain_name v6 in
       `Domain (Domain_name.to_strings domain_name)
-    | Domain.Extension _ -> failwith "The SMTP server domain must not be an extension" in
+    | Domain.Extension _ ->
+      failwith "The SMTP server domain must not be an extension" in
   local, domain
File "lib/ptt_server.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_server.ml b/_build/default/lib/.formatted/ptt_server.ml
index 1f7a67a..fb9c638 100644
--- a/_build/default/lib/ptt_server.ml
+++ b/_build/default/lib/.formatted/ptt_server.ml
@@ -21,7 +21,8 @@ module Make (Time : Mirage_time.S) (Stack : Tcpip.Stack.V4V6) = struct
     let listener flow =
       let ipaddr, port = Stack.TCP.dst flow in
       Lwt_mutex.with_lock mutex @@ fun () ->
-      Log.debug (fun m -> m "A new incoming connection: %a:%d" Ipaddr.pp ipaddr port);
+      Log.debug (fun m ->
+          m "A new incoming connection: %a:%d" Ipaddr.pp ipaddr port);
       Queue.push flow queue;
       Lwt_condition.signal condition ();
       Lwt.return_unit in
@@ -48,26 +49,28 @@ module Make (Time : Mirage_time.S) (Stack : Tcpip.Stack.V4V6) = struct
 
   let rec clean acc = function
     | [] -> acc
-    | th :: ths ->
-        match Lwt.state th with
-        | Return () -> clean acc ths
-        | Fail exn ->
-            Log.err (fun m -> m "A spawned thread failed with: %S" (Printexc.to_string exn));
-            clean acc ths
-        | Sleep -> clean (th :: acc) ths
+    | th :: ths -> (
+      match Lwt.state th with
+      | Return () -> clean acc ths
+      | Fail exn ->
+        Log.err (fun m ->
+            m "A spawned thread failed with: %S" (Printexc.to_string exn));
+        clean acc ths
+      | Sleep -> clean (th :: acc) ths)
 
   let rec terminate = function
     | [] ->
-        Log.debug (fun m -> m "The server is cleaned");
-        Lwt.return_unit
-    | th :: ths ->
-        Log.debug (fun m -> m "Unterminated tasks");
-        match Lwt.state th with
-        | Return () -> terminate ths
-        | Fail exn ->
-            Log.err (fun m -> m "A spawned thread failed with: %S" (Printexc.to_string exn));
-            terminate ths
-        | Sleep -> Lwt.pause () >>= fun () -> terminate (th :: ths)
+      Log.debug (fun m -> m "The server is cleaned");
+      Lwt.return_unit
+    | th :: ths -> (
+      Log.debug (fun m -> m "Unterminated tasks");
+      match Lwt.state th with
+      | Return () -> terminate ths
+      | Fail exn ->
+        Log.err (fun m ->
+            m "A spawned thread failed with: %S" (Printexc.to_string exn));
+        terminate ths
+      | Sleep -> Lwt.pause () >>= fun () -> terminate (th :: ths))
 
   let serve_when_ready ?stop ~handler service =
     `Initialized
File "lib/sSMTP.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/sSMTP.mli b/_build/default/lib/.formatted/sSMTP.mli
index 4c8f0d4..f337f4c 100644
--- a/_build/default/lib/sSMTP.mli
+++ b/_build/default/lib/.formatted/sSMTP.mli
@@ -65,9 +65,7 @@ val m_mail : context -> (unit, [> error ]) Colombe.State.t
 val m_end : context -> ([> `Quit ], [> error ]) Colombe.State.t
 
 val m_relay_init :
-     context
-  -> info
-  -> ([> `Quit | `Send of email ], [> error ]) Colombe.State.t
+  context -> info -> ([> `Quit | `Send of email ], [> error ]) Colombe.State.t
 
 val m_submission_init :
      context
File "lib/submission.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/submission.mli b/_build/default/lib/.formatted/submission.mli
index ccb9716..6973b1d 100644
--- a/_build/default/lib/submission.mli
+++ b/_build/default/lib/.formatted/submission.mli
@@ -3,12 +3,13 @@ open Rresult
 module Make (Stack : Tcpip.Stack.V4V6) : sig
   type 'k server
 
-  type info = SSMTP.info =
-    { domain: Colombe.Domain.t
+  type info = SSMTP.info = {
+      domain: Colombe.Domain.t
     ; ipaddr: Ipaddr.t
     ; tls: Tls.Config.server option
     ; zone: Mrmime.Date.Zone.t
-    ; size: int64 }
+    ; size: int64
+  }
 
   val info : 'k server -> info
 
@@ -20,7 +21,9 @@ module Make (Stack : Tcpip.Stack.V4V6) : sig
        info:info
     -> authenticator:'k Authentication.t
     -> Mechanism.t list
-    -> 'k server * (Messaged.key * string Lwt_stream.t) Lwt_stream.t * (unit -> unit)
+    -> 'k server
+       * (Messaged.key * string Lwt_stream.t) Lwt_stream.t
+       * (unit -> unit)
 
   val accept :
        ?encoder:(unit -> bytes)
File "lib/sMTP.mli", line 1, characters 0-0:
diff --git a/_build/default/lib/sMTP.mli b/_build/default/lib/.formatted/sMTP.mli
index 73c2b03..8b37159 100644
--- a/_build/default/lib/sMTP.mli
+++ b/_build/default/lib/.formatted/sMTP.mli
@@ -4,22 +4,17 @@ open Colombe
 module Value : sig
   include module type of Logic.Value
 
-  val encode_without_tls :
-       Encoder.encoder
-    -> 'x send
-    -> 'x
-    -> (unit, error) t
-
-  val decode_without_tls :
-    Decoder.decoder -> 'x recv -> ('x, error) t
+  val encode_without_tls : Encoder.encoder -> 'x send -> 'x -> (unit, error) t
+  val decode_without_tls : Decoder.decoder -> 'x recv -> ('x, error) t
 end
 
 module Value_with_tls :
-  module type of Sendmail_with_starttls.Make_with_tls (Value)
+    module type of Sendmail_with_starttls.Make_with_tls (Value)
 
-module Monad : Logic.MONAD
-  with type context = Sendmail_with_starttls.Context_with_tls.t
-   and type error = Value_with_tls.error
+module Monad :
+  Logic.MONAD
+    with type context = Sendmail_with_starttls.Context_with_tls.t
+     and type error = Value_with_tls.error
 
 type context = Sendmail_with_starttls.Context_with_tls.t
 
@@ -62,7 +57,7 @@ val m_submission :
   -> ( [> `Quit
        | `Authentication of Domain.t * Mechanism.t
        | `Authentication_with_payload of Domain.t * Mechanism.t * string ]
-     , [> error ])
+     , [> error ] )
      Colombe.State.t
 
 val m_relay :
@@ -74,9 +69,7 @@ val m_mail : context -> (unit, [> error ]) Colombe.State.t
 val m_end : context -> ([> `Quit ], [> error ]) Colombe.State.t
 
 val m_relay_init :
-     context
-  -> info
-  -> ([> `Quit | `Send of email ], [> error ]) Colombe.State.t
+  context -> info -> ([> `Quit | `Send of email ], [> error ]) Colombe.State.t
 
 val m_submission_init :
      context
@@ -85,5 +78,5 @@ val m_submission_init :
   -> ( [> `Quit
        | `Authentication of Domain.t * Mechanism.t
        | `Authentication_with_payload of Domain.t * Mechanism.t * string ]
-     , [> error ])
+     , [> error ] )
      Colombe.State.t
File "lib/ptt_flow.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_flow.ml b/_build/default/lib/.formatted/ptt_flow.ml
index 076a2ea..1bc0137 100644
--- a/_build/default/lib/ptt_flow.ml
+++ b/_build/default/lib/.formatted/ptt_flow.ml
@@ -3,7 +3,7 @@ open Colombe.State
 open Colombe
 open Lwt.Infix
 
-let ( <.> ) f g = fun x -> f (g x)
+let ( <.> ) f g x = f (g x)
 
 module Lwt_scheduler = Sigs.Make (Lwt)
 
@@ -12,7 +12,7 @@ let lwt_bind x f =
   inj (prj x >>= (prj <.> f))
 
 let lwt =
-  { Sigs.bind = lwt_bind; return = (fun x -> Lwt_scheduler.inj (Lwt.return x)) }
+  {Sigs.bind= lwt_bind; return= (fun x -> Lwt_scheduler.inj (Lwt.return x))}
 
 exception Rdwr of string
 
@@ -28,29 +28,26 @@ module Rdwr (Flow : Mirage_flow.S) = struct
     | Ok v -> Lwt.return v
     | Error err -> Lwt.fail (Rdwr (Fmt.str "%a" pp err))
 
-  type t =
-    { queue : (char, Bigarray.int8_unsigned_elt) Ke.Rke.t
-    ; flow : Flow.flow }
+  type t = {queue: (char, Bigarray.int8_unsigned_elt) Ke.Rke.t; flow: Flow.flow}
 
-  let make flow = { flow; queue = Ke.Rke.create ~capacity:0x800 Bigarray.char }
+  let make flow = {flow; queue= Ke.Rke.create ~capacity:0x800 Bigarray.char}
 
   let recv flow payload p_off p_len =
-    if Ke.Rke.is_empty flow.queue
-    then (
+    if Ke.Rke.is_empty flow.queue then (
       Flow.read flow.flow >>= failwith Flow.pp_error >>= function
       | `Eof -> Lwt.return 0
       | `Data res ->
-          Ke.Rke.N.push flow.queue ~blit:blit0 ~length:Cstruct.length res ;
-          let len = min p_len (Ke.Rke.length flow.queue) in
-          Ke.Rke.N.keep_exn flow.queue ~blit:blit1 ~length:Bytes.length
-            ~off:p_off ~len payload ;
-          Ke.Rke.N.shift_exn flow.queue len ;
-          Lwt.return len)
+        Ke.Rke.N.push flow.queue ~blit:blit0 ~length:Cstruct.length res;
+        let len = min p_len (Ke.Rke.length flow.queue) in
+        Ke.Rke.N.keep_exn flow.queue ~blit:blit1 ~length:Bytes.length ~off:p_off
+          ~len payload;
+        Ke.Rke.N.shift_exn flow.queue len;
+        Lwt.return len)
     else
       let len = min p_len (Ke.Rke.length flow.queue) in
       Ke.Rke.N.keep_exn flow.queue ~blit:blit1 ~length:Bytes.length ~off:p_off
-        ~len payload ;
-      Ke.Rke.N.shift_exn flow.queue len ;
+        ~len payload;
+      Ke.Rke.N.shift_exn flow.queue len;
       Lwt.return len
 
   let send flow payload p_off p_len =
@@ -71,23 +68,23 @@ module Make (Flow : Mirage_flow.S) = struct
       | len -> Lwt.return (`Len len) in
     let rd flow buf off len = inj (rd flow buf off len)
     and wr flow buf off len = inj (Flow'.send flow buf off len) in
-    { Colombe.Sigs.rd; wr }
+    {Colombe.Sigs.rd; wr}
 
   let run :
       type s flow.
-      s impl ->
-      (flow, s) rdwr ->
-      flow ->
-      ('a, 'err) t ->
-      (('a, 'err) result, s) io =
-   fun { bind; return } rdwr flow m ->
+         s impl
+      -> (flow, s) rdwr
+      -> flow
+      -> ('a, 'err) t
+      -> (('a, 'err) result, s) io =
+   fun {bind; return} rdwr flow m ->
     let ( >>= ) = bind in
-  
+
     let rec go = function
-      | Read { buffer; off; len; k } ->
-          rdwr.rd flow buffer off len >>= fun v -> go (k v)
-      | Write { buffer; off; len; k } ->
-          rdwr.wr flow buffer off len >>= fun () -> go (k len)
+      | Read {buffer; off; len; k} ->
+        rdwr.rd flow buffer off len >>= fun v -> go (k v)
+      | Write {buffer; off; len; k} ->
+        rdwr.wr flow buffer off len >>= fun () -> go (k len)
       | Return v -> return (Ok v)
       | Error err -> return (Error err : ('a, 'err) result) in
     go m
@@ -95,8 +92,7 @@ module Make (Flow : Mirage_flow.S) = struct
   let make = Flow'.make
 
   let run flow m =
-    Lwt.catch (fun () -> Lwt_scheduler.prj (run lwt rdwr flow m))
-    @@ function
-      | Rdwr msg -> Lwt.return_error (`Flow msg)
-      | exn -> Lwt.reraise exn
+    Lwt.catch (fun () -> Lwt_scheduler.prj (run lwt rdwr flow m)) @@ function
+    | Rdwr msg -> Lwt.return_error (`Flow msg)
+    | exn -> Lwt.reraise exn
 end
File "lib/relay.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/relay.ml b/_build/default/lib/.formatted/relay.ml
index fd652d9..4c83806 100644
--- a/_build/default/lib/relay.ml
+++ b/_build/default/lib/.formatted/relay.ml
@@ -2,7 +2,6 @@ open Rresult
 open Lwt.Infix
 
 let ( >>? ) = Lwt_result.bind
-
 let src = Logs.Src.create "ptt.relay"
 
 module Log = (val Logs.src_log src : Logs.LOG)
@@ -10,39 +9,42 @@ module Log = (val Logs.src_log src : Logs.LOG)
 module Make (Stack : Tcpip.Stack.V4V6) = struct
   include Ptt_flow.Make (Stack.TCP)
 
-  type server =
-    { info: info
+  type server = {
+      info: info
     ; messaged: Messaged.t
-    ; push: ((Messaged.key * string Lwt_stream.t) option -> unit)
-    ; mutable count: int64}
-  
-  and info = Ptt_common.info =
-    { domain: Colombe.Domain.t
+    ; push: (Messaged.key * string Lwt_stream.t) option -> unit
+    ; mutable count: int64
+  }
+
+  and info = Ptt_common.info = {
+      domain: Colombe.Domain.t
     ; ipaddr: Ipaddr.t
     ; tls: Tls.Config.server option
     ; zone: Mrmime.Date.Zone.t
-    ; size: int64 }
-  
+    ; size: int64
+  }
+
   let info {info; _} = info
 
   let create ~info =
     let messaged, push = Lwt_stream.create () in
     let close () = push None in
     {info; messaged; push; count= 0L}, messaged, close
-  
+
   let succ server =
     let v = server.count in
     server.count <- Int64.succ server.count;
     v
-  
-  type error = [ SMTP.error | `Too_big_data | `Flow of string | `Invalid_recipients ]
-  
+
+  type error =
+    [ SMTP.error | `Too_big_data | `Flow of string | `Invalid_recipients ]
+
   let pp_error ppf = function
     | #SMTP.error as err -> SMTP.pp_error ppf err
     | `Too_big_data -> Fmt.pf ppf "Too big data"
     | `Flow msg -> Fmt.pf ppf "Error at the protocol level: %s" msg
     | `Invalid_recipients -> Fmt.string ppf "Invalid recipients"
-  
+
   let properly_close_tls flow ctx =
     let encoder = Sendmail_with_starttls.Context_with_tls.encoder ctx in
     let m =
@@ -62,11 +64,9 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
         | str ->
           let len = String.length str in
           let str = str ^ "\r\n" in
-          bounded_stream#push str >>=
-          go (count + len + 2)
-    in
+          bounded_stream#push str >>= go (count + len + 2) in
     go 0 ()
-  
+
   let accept :
          ?encoder:(unit -> bytes)
       -> ?decoder:(unit -> bytes)
@@ -78,12 +78,14 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
       -> server
       -> (unit, error) result Lwt.t =
    fun ?encoder ?decoder ?queue ~ipaddr flow dns resolver server ->
-    let ctx = Sendmail_with_starttls.Context_with_tls.make ?encoder ?decoder ?queue () in
+    let ctx =
+      Sendmail_with_starttls.Context_with_tls.make ?encoder ?decoder ?queue ()
+    in
     let m = SMTP.m_relay_init ctx server.info in
     let flow = make flow in
     run flow m >>? function
     | `Quit -> properly_close_tls flow ctx >>? fun () -> Lwt.return_ok ()
-    | `Send {SMTP.domain_from; from; recipients; _} ->
+    | `Send {SMTP.domain_from; from; recipients; _} -> (
       Ptt_common.recipients_are_reachable ~info:server.info dns resolver
         (List.map fst recipients)
       >>= function
@@ -105,6 +107,8 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
         properly_close_tls flow ctx >>? fun () -> Lwt.return_ok ()
       | false ->
         let e = `Invalid_recipients in
-        let m = SMTP.m_properly_close_and_fail ctx ~message:"No valid recipients" e in
-        run flow m
+        let m =
+          SMTP.m_properly_close_and_fail ctx ~message:"No valid recipients" e
+        in
+        run flow m)
 end
File "lib/sSMTP.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/sSMTP.ml b/_build/default/lib/.formatted/sSMTP.ml
index 2b46868..31762c9 100644
--- a/_build/default/lib/sSMTP.ml
+++ b/_build/default/lib/.formatted/sSMTP.ml
@@ -107,10 +107,14 @@ include Logic.Make (Monad)
 
 let m_submission_init ctx info ms =
   let open Monad in
-  let* () = send ctx Value.PP_220 [Colombe.Domain.to_string info.Ptt_common.domain] in
+  let* () =
+    send ctx Value.PP_220 [Colombe.Domain.to_string info.Ptt_common.domain]
+  in
   m_submission_init ctx info ms
 
 let m_relay_init ctx info =
   let open Monad in
-  let* () = send ctx Value.PP_220 [Colombe.Domain.to_string info.Ptt_common.domain] in
+  let* () =
+    send ctx Value.PP_220 [Colombe.Domain.to_string info.Ptt_common.domain]
+  in
   m_relay_init ctx info
File "bin/mti_gf.ml", line 1, characters 0-0:
diff --git a/_build/default/bin/mti_gf.ml b/_build/default/bin/.formatted/mti_gf.ml
index b1c325b..5c16c35 100644
--- a/_build/default/bin/mti_gf.ml
+++ b/_build/default/bin/.formatted/mti_gf.ml
@@ -11,16 +11,17 @@ let ( <.> ) f g x = f (g x)
 
 open Rresult
 
-module Happy_eyeballs_daemon = Happy_eyeballs_mirage.Make
-  (Time) (Mclock) (Tcpip_stack_socket.V4V6)
+module Happy_eyeballs_daemon =
+  Happy_eyeballs_mirage.Make (Time) (Mclock) (Tcpip_stack_socket.V4V6)
 
-module Dns_client = Dns_client_mirage.Make
-  (Mirage_crypto_rng) (Time) (Mclock) (Pclock) (Tcpip_stack_socket.V4V6)
-  (Happy_eyeballs_daemon)
+module Dns_client =
+  Dns_client_mirage.Make (Mirage_crypto_rng) (Time) (Mclock) (Pclock)
+    (Tcpip_stack_socket.V4V6)
+    (Happy_eyeballs_daemon)
 
-module Server = Mti_gf.Make
-  (Time) (Mclock) (Pclock) (Tcpip_stack_socket.V4V6)
-  (Dns_client) (Happy_eyeballs_daemon)
+module Server =
+  Mti_gf.Make (Time) (Mclock) (Pclock) (Tcpip_stack_socket.V4V6) (Dns_client)
+    (Happy_eyeballs_daemon)
 
 let load_file filename = Bos.OS.File.read filename
 
@@ -44,8 +45,10 @@ let job ~domain locals =
   let open Lwt.Infix in
   let open Tcpip_stack_socket.V4V6 in
   let ipv4_only = false and ipv6_only = false in
-  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun tcpv4v6 ->
-  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun udpv4v6 ->
+  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun tcpv4v6 ->
+  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun udpv4v6 ->
   connect udpv4v6 tcpv4v6 >>= fun stack ->
   let info =
     {
@@ -65,8 +68,8 @@ let romain_calascibetta =
 
 let () =
   let locals = Ptt_map.empty ~postmaster:romain_calascibetta in
-  let domain = Colombe.Domain.Domain [ "ptt"; "fr" ] in
+  let domain = Colombe.Domain.Domain ["ptt"; "fr"] in
   Ptt_map.add
-    ~local:(`Dot_string [ "romain"; "calascibetta" ])
+    ~local:(`Dot_string ["romain"; "calascibetta"])
     romain_calascibetta locals;
   Lwt_main.run (job ~domain locals)
File "bin/lipap.ml", line 1, characters 0-0:
diff --git a/_build/default/bin/lipap.ml b/_build/default/bin/.formatted/lipap.ml
index c0c2c0b..71de88c 100644
--- a/_build/default/bin/lipap.ml
+++ b/_build/default/bin/.formatted/lipap.ml
@@ -11,16 +11,17 @@ let ( <.> ) f g x = f (g x)
 
 open Rresult
 
-module Happy_eyeballs_daemon = Happy_eyeballs_mirage.Make
-  (Time) (Mclock) (Tcpip_stack_socket.V4V6)
+module Happy_eyeballs_daemon =
+  Happy_eyeballs_mirage.Make (Time) (Mclock) (Tcpip_stack_socket.V4V6)
 
-module Dns_client = Dns_client_mirage.Make
-  (Mirage_crypto_rng) (Time) (Mclock) (Pclock) (Tcpip_stack_socket.V4V6)
-  (Happy_eyeballs_daemon)
+module Dns_client =
+  Dns_client_mirage.Make (Mirage_crypto_rng) (Time) (Mclock) (Pclock)
+    (Tcpip_stack_socket.V4V6)
+    (Happy_eyeballs_daemon)
 
 module Server =
-  Lipap.Make (Time) (Mclock) (Pclock) (Tcpip_stack_socket.V4V6)
-    (Dns_client) (Happy_eyeballs_daemon)
+  Lipap.Make (Time) (Mclock) (Pclock) (Tcpip_stack_socket.V4V6) (Dns_client)
+    (Happy_eyeballs_daemon)
 
 let load_file filename = Bos.OS.File.read filename
 
@@ -37,9 +38,7 @@ let private_key =
   X509.Private_key.decode_pem raw
 
 let private_key = Rresult.R.get_ok private_key
-
 let authenticator _username _password = Lwt.return true
-
 let authenticator = Ptt.Authentication.v authenticator
 
 let job ~domain locals =
@@ -52,8 +51,10 @@ let job ~domain locals =
       ~authenticator:(fun ?ip:_ ~host:_ _ -> Ok None)
       () in
   let tls = Rresult.R.failwith_error_msg tls in
-  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun tcpv4v6 ->
-  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun udpv4v6 ->
+  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun tcpv4v6 ->
+  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun udpv4v6 ->
   connect udpv4v6 tcpv4v6 >>= fun stack ->
   let info =
     {
@@ -78,8 +79,8 @@ let romain_calascibetta =
 
 let () =
   let locals = Ptt_map.empty ~postmaster:romain_calascibetta in
-  let domain = Colombe.Domain.Domain [ "ptt"; "fr" ] in
+  let domain = Colombe.Domain.Domain ["ptt"; "fr"] in
   Ptt_map.add
-    ~local:(`Dot_string [ "romain"; "calascibetta" ])
+    ~local:(`Dot_string ["romain"; "calascibetta"])
     romain_calascibetta locals;
   Lwt_main.run (job ~domain locals)
File "lib/spartacus.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/spartacus.ml b/_build/default/lib/.formatted/spartacus.ml
index 983adba..f69fe0c 100644
--- a/_build/default/lib/spartacus.ml
+++ b/_build/default/lib/.formatted/spartacus.ml
@@ -5,7 +5,7 @@ let src = Logs.Src.create "ptt.spartacus"
 
 module Log : Logs.LOG = (val Logs.src_log src)
 
-let ( $ ) f g = fun x -> f (g x)
+let ( $ ) f g x = f (g x)
 
 module Make
     (Time : Mirage_time.S)
@@ -22,8 +22,8 @@ struct
   let resolver =
     let open Ptt_common in
     let getmxbyname dns domain_name =
-      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name
-      >|= Result.map snd in
+      Dns_client.getaddrinfo dns Dns.Rr_map.Mx domain_name >|= Result.map snd
+    in
     let gethostbyname dns domain_name =
       let ipv4 =
         Dns_client.gethostbyname dns domain_name
@@ -31,12 +31,12 @@ struct
       let ipv6 =
         Dns_client.gethostbyname6 dns domain_name
         >|= Result.map (fun ipv6 -> Ipaddr.V6 ipv6) in
-      Lwt.all [ ipv4; ipv6 ] >|= function
-      | [ _; (Ok _ as ipv6) ] -> ipv6
-      | [ (Ok _ as ipv4); Error _ ] -> ipv4
-      | [ (Error _ as err); _ ] -> err
+      Lwt.all [ipv4; ipv6] >|= function
+      | [_; (Ok _ as ipv6)] -> ipv6
+      | [(Ok _ as ipv4); Error _] -> ipv4
+      | [(Error _ as err); _] -> err
       | [] | [_] | _ :: _ :: _ -> assert false in
-    { getmxbyname; gethostbyname }
+    {getmxbyname; gethostbyname}
 
   let server_job ~pool ?stop ~port stack dns server close =
     let handler flow =
@@ -57,9 +57,9 @@ struct
         Log.err (fun m -> m "<%a:%d> %s" Ipaddr.pp ipaddr port err);
         Lwt.return () in
     Server.init ~port stack >>= fun service ->
-    Server.serve_when_ready ?stop ~handler service
-    |> fun (`Initialized job) ->
-    let job = job >|= close in job
+    Server.serve_when_ready ?stop ~handler service |> fun (`Initialized job) ->
+    let job = job >|= close in
+    job
 
   let logic_job ~info map (ic, oc) =
     let rec go () =
@@ -72,8 +72,7 @@ struct
           | Error (`Msg err) ->
             Log.err (fun m -> m "Got an error from the incoming email: %s." err);
             Lwt.return backup
-          | Ok (_label, stream) ->
-            Lwt.return stream in
+          | Ok (_label, stream) -> Lwt.return stream in
         filter () >>= fun stream ->
         let sender, _ = Ptt.Messaged.from key in
         let recipients = Ptt.Messaged.recipients key in
@@ -81,12 +80,17 @@ struct
         let recipients = Ptt_map.expand ~info map recipients in
         let recipients = Ptt_aggregate.to_recipients ~info recipients in
         let id = Ptt_common.id_to_messageID ~info (Ptt.Messaged.id key) in
-        let elts = List.map (fun recipients ->
-          { Ptt_sendmail.sender
-          ; recipients
-          ; data= Lwt_stream.clone stream
-          ; policies= []
-          ; id }) recipients in
+        let elts =
+          List.map
+            (fun recipients ->
+              {
+                Ptt_sendmail.sender
+              ; recipients
+              ; data= Lwt_stream.clone stream
+              ; policies= []
+              ; id
+              })
+            recipients in
         List.iter (oc $ Option.some) elts;
         Lwt.pause () >>= go in
     go ()
@@ -104,12 +108,12 @@ struct
       let decoder = Bytes.create Colombe.Decoder.io_buffer_size in
       let queue = Ke.Rke.create ~capacity:0x1000 Bigarray.char in
       Lwt.return (encoder, decoder, queue) in
-    let pool1 =
-      { Ptt_sendmail.pool= fun fn -> Lwt_pool.use pool1 fn } in
+    let pool1 = {Ptt_sendmail.pool= (fun fn -> Lwt_pool.use pool1 fn)} in
     let ic_server, stream0, close0 = Filter.create ~info in
     let oc_server, push0 = Sendmail.v ~resolver ~pool:pool1 ~info tls in
     Lwt.join
-      [ server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
-      ; logic_job ~info locals (stream0, push0)
-      ; Sendmail.job dns he oc_server ]
+      [
+        server_job ~pool:pool0 ?stop ~port stack dns ic_server close0
+      ; logic_job ~info locals (stream0, push0); Sendmail.job dns he oc_server
+      ]
 end
File "lib/sMTP.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/sMTP.ml b/_build/default/lib/.formatted/sMTP.ml
index 86eb4e9..659b32d 100644
--- a/_build/default/lib/sMTP.ml
+++ b/_build/default/lib/.formatted/sMTP.ml
@@ -28,14 +28,14 @@ end
 
 module Value_with_tls = Sendmail_with_starttls.Make_with_tls (Value)
 
-module Monad
-  : Logic.MONAD
+module Monad :
+  Logic.MONAD
     with type context = Sendmail_with_starttls.Context_with_tls.t
-     and type error = Value_with_tls.error
-= struct
+     and type error = Value_with_tls.error = struct
   type context = Sendmail_with_starttls.Context_with_tls.t
 
-  include State.Scheduler (Sendmail_with_starttls.Context_with_tls) (Value_with_tls)
+  include
+    State.Scheduler (Sendmail_with_starttls.Context_with_tls) (Value_with_tls)
 end
 
 type context = Sendmail_with_starttls.Context_with_tls.t
@@ -52,14 +52,13 @@ let pp_value_with_tls_error ppf = function
     Fmt.pf ppf "TLS alert: %s" (Tls.Packet.alert_type_to_string alert)
   | `Tls_failure failure ->
     Fmt.pf ppf "TLS failure: %s" (Tls.Engine.string_of_failure failure)
-  | `Tls_closed ->
-    Fmt.string ppf "TLS connection closed by peer"
+  | `Tls_closed -> Fmt.string ppf "TLS connection closed by peer"
   | `Value (#Value.error as err) -> Value.pp_error ppf err
 
 let pp_error ppf = function
   | `Tls (#Value_with_tls.error as err)
   | `Protocol (#Value_with_tls.error as err) ->
-      pp_value_with_tls_error ppf err
+    pp_value_with_tls_error ppf err
   | `No_recipients -> Fmt.string ppf "No recipients"
   | `Too_many_bad_commands -> Fmt.string ppf "Too many bad commands"
   | `Too_many_recipients -> Fmt.string ppf "Too many recipients"
@@ -93,8 +92,9 @@ let m_relay_init ctx info =
       >>= fun () -> recv ctx Value.Helo in
     let capabilities =
       [
-        politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr; "8BITMIME"
-      ; "SMTPUTF8"; "STARTTLS"; Fmt.str "SIZE %Ld" info.Ptt_common.size
+        politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr
+      ; "8BITMIME"; "SMTPUTF8"; "STARTTLS"
+      ; Fmt.str "SIZE %Ld" info.Ptt_common.size
       ] in
     let* () = send ctx Value.PP_250 capabilities in
     let reset = ref 0 and bad = ref 0 in
@@ -137,8 +137,8 @@ let m_submission_init ctx info ms =
       >>= fun () -> recv ctx Value.Helo in
     let capabilities =
       [
-        politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr; "8BITMIME"
-      ; "SMTPUTF8"; "STARTTLS"
+        politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr
+      ; "8BITMIME"; "SMTPUTF8"; "STARTTLS"
       ; Fmt.str "AUTH %a" Fmt.(list ~sep:(const string " ") Mechanism.pp) ms
       ; Fmt.str "SIZE %Ld" info.Ptt_common.size
       ] in
File "lib/logic.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/logic.ml b/_build/default/lib/.formatted/logic.ml
index 9990909..32aa761 100644
--- a/_build/default/lib/logic.ml
+++ b/_build/default/lib/.formatted/logic.ml
@@ -98,7 +98,9 @@ module type MONAD = sig
   val decode :
        context
     -> 'a Value.recv
-    -> (context -> 'a -> ('b, ([> `Protocol of error ] as 'err)) Colombe.State.t)
+    -> (   context
+        -> 'a
+        -> ('b, ([> `Protocol of error ] as 'err)) Colombe.State.t)
     -> ('b, 'err) Colombe.State.t
 
   val send :
@@ -280,8 +282,8 @@ module Make (Monad : MONAD) = struct
     let* () =
       send ctx Value.PP_250
         [
-          politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr; "8BITMIME"
-        ; "SMTPUTF8"; Fmt.str "SIZE %Ld" info.Ptt_common.size
+          politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr
+        ; "8BITMIME"; "SMTPUTF8"; Fmt.str "SIZE %Ld" info.Ptt_common.size
         ] in
     m_relay ctx ~domain_from
 
@@ -291,8 +293,8 @@ module Make (Monad : MONAD) = struct
     let* () =
       send ctx Value.PP_250
         [
-          politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr; "8BITMIME"
-        ; "SMTPUTF8"; Fmt.str "SIZE %Ld" info.Ptt_common.size
+          politely ~domain:info.Ptt_common.domain ~ipaddr:info.Ptt_common.ipaddr
+        ; "8BITMIME"; "SMTPUTF8"; Fmt.str "SIZE %Ld" info.Ptt_common.size
         ; Fmt.str "AUTH %a" Fmt.(list ~sep:(const string " ") Mechanism.pp) ms
         ] in
     m_submission ctx ~domain_from ms
File "lib/ptt_sendmail.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/ptt_sendmail.ml b/_build/default/lib/.formatted/ptt_sendmail.ml
index ee14759..23affda 100644
--- a/_build/default/lib/ptt_sendmail.ml
+++ b/_build/default/lib/.formatted/ptt_sendmail.ml
@@ -1,31 +1,35 @@
 let src = Logs.Src.create "ptt.sendmail"
 
 module Log = (val Logs.src_log src)
-
 open Lwt.Infix
 
-let ( <$> ) f g = fun x -> match g x with
-  | Ok x -> f x | Error _ as err -> err
+let ( <$> ) f g x = match g x with Ok x -> f x | Error _ as err -> err
 
 [@@@warning "-30"]
 
-type recipients =
-  { domain : [ `Ipaddr of Ipaddr.t | `Domain of [ `host ] Domain_name.t ]
-  ; locals : [ `All | `Some of Emile.local list | `Postmaster ] }
-and 'dns t =
-  { stream : elt Lwt_stream.t
-  ; push : elt push
-  ; info : Ptt_common.info
-  ; resolver : 'dns Ptt_common.resolver
-  ; tls : Tls.Config.client
-  ; pool : pool option }
-and elt =
-  { sender : Colombe.Reverse_path.t
-  ; recipients : recipients
-  ; data : string Lwt_stream.t
-  ; policies : policy list
-  ; id : Mrmime.MessageID.t }
-and pool = { pool : 'a. (resource -> 'a Lwt.t) -> 'a Lwt.t }
+type recipients = {
+    domain: [ `Ipaddr of Ipaddr.t | `Domain of [ `host ] Domain_name.t ]
+  ; locals: [ `All | `Some of Emile.local list | `Postmaster ]
+}
+
+and 'dns t = {
+    stream: elt Lwt_stream.t
+  ; push: elt push
+  ; info: Ptt_common.info
+  ; resolver: 'dns Ptt_common.resolver
+  ; tls: Tls.Config.client
+  ; pool: pool option
+}
+
+and elt = {
+    sender: Colombe.Reverse_path.t
+  ; recipients: recipients
+  ; data: string Lwt_stream.t
+  ; policies: policy list
+  ; id: Mrmime.MessageID.t
+}
+
+and pool = {pool: 'a. (resource -> 'a Lwt.t) -> 'a Lwt.t}
 and resource = bytes * bytes * (char, Bigarray.int8_unsigned_elt) Ke.Rke.t
 and 'a push = 'a option -> unit
 and policy = [ `Ignore ]
@@ -33,109 +37,124 @@ and policy = [ `Ignore ]
 [@@@warning "+30"]
 
 let warn_about_an_unreachable_mail_exchange ~domain ~mail_exchange msg =
-  Log.warn @@ fun m -> m "Impossible to resolve %a, a mail exchange server for %a: %s"
-    Domain_name.pp mail_exchange Domain_name.pp domain msg
+  Log.warn @@ fun m ->
+  m "Impossible to resolve %a, a mail exchange server for %a: %s" Domain_name.pp
+    mail_exchange Domain_name.pp domain msg
 
 (* recipients -> Colombe.Forward_path.t list *)
 let recipients_to_forward_paths recipients =
   let open Colombe in
   let open Forward_path in
-  let domain = match recipients.domain with
+  let domain =
+    match recipients.domain with
     | `Ipaddr (Ipaddr.V4 v4) -> Domain.IPv4 v4
     | `Ipaddr (Ipaddr.V6 v6) -> Domain.IPv6 v6
     | `Domain domain -> Domain.Domain (Domain_name.to_strings domain) in
   let local_to_forward_path local =
     let local = List.map (function `Atom x -> x | `String x -> x) local in
-    Forward_path { Path.local= `Dot_string local; domain; rest= [] } in
+    Forward_path {Path.local= `Dot_string local; domain; rest= []} in
   match recipients.locals with
-  | `All -> [ Domain domain ]
+  | `All -> [Domain domain]
   | `Some locals -> List.map local_to_forward_path locals
-  | `Postmaster -> [ Postmaster ]
+  | `Postmaster -> [Postmaster]
 
 let guess_return_path stream =
   let open Mrmime in
   let decoder = Hd.decoder Field_name.Map.empty in
-  let extract_return_path
-    : type a. a Field.t -> a -> Colombe.Forward_path.t option Lwt.t
-    = fun w v -> match w with
+  let extract_return_path :
+      type a. a Field.t -> a -> Colombe.Forward_path.t option Lwt.t =
+   fun w v ->
+    match w with
     | Unstructured ->
       let str = Unstructured.to_string v in
-      begin match (Colombe_emile.to_forward_path <$> Emile.of_string) str with
-      | Ok recipient -> Lwt.return_some recipient
-      | Error _ -> Lwt.return_none end
+      begin
+        match (Colombe_emile.to_forward_path <$> Emile.of_string) str with
+        | Ok recipient -> Lwt.return_some recipient
+        | Error _ -> Lwt.return_none
+      end
     | _ -> Lwt.return_none in
-  let rec go decoder = match Hd.decode decoder with
+  let rec go decoder =
+    match Hd.decode decoder with
     | `End _ | `Malformed _ -> Lwt.return_none
     | `Field field ->
-      let Field.Field (field_name, w, v) = Location.without_location field in
-      if Field_name.equal field_name Field_name.return_path
-      then extract_return_path w v
+      let (Field.Field (field_name, w, v)) = Location.without_location field in
+      if Field_name.equal field_name Field_name.return_path then
+        extract_return_path w v
       else go decoder
-    | `Await ->
+    | `Await -> (
       Lwt_stream.get stream >>= function
-      | Some str -> Hd.src decoder str 0 (String.length str); go decoder
-      | None -> Lwt.return_none in
+      | Some str ->
+        Hd.src decoder str 0 (String.length str);
+        go decoder
+      | None -> Lwt.return_none) in
   go decoder
 
 module Make
-  (Clock : Mirage_clock.PCLOCK)
-  (Stack : Tcpip.Stack.V4V6)
-  (Happy_eyeballs : Happy_eyeballs_mirage.S with type flow = Stack.TCP.flow)
-= struct
+    (Clock : Mirage_clock.PCLOCK)
+    (Stack : Tcpip.Stack.V4V6)
+    (Happy_eyeballs : Happy_eyeballs_mirage.S with type flow = Stack.TCP.flow) =
+struct
   module Sendmail = Sendmail_mirage.Make (Clock) (Stack.TCP) (Happy_eyeballs)
 
   let to_stream stream =
     let stream = Lwt_stream.map (fun str -> str, 0, String.length str) stream in
     let consumed = ref false in
-    consumed, (fun () -> consumed := true; Lwt_stream.get stream)
+    ( consumed
+    , fun () ->
+        consumed := true;
+        Lwt_stream.get stream )
 
   (* NOTE(dinosaure): to ensure that we are able to inject a fake DNS resolver,
      we must use an IP address as a destination to avoid the resolution mechanism
      of happy-eyeballs! *)
 
-  let sendmail ?(last_option= false) he t ~ipaddr elt =
+  let sendmail ?(last_option = false) he t ~ipaddr elt =
     let ( let* ) = Lwt.bind in
     let destination = Ipaddr.to_string ipaddr in
     let backup = Lwt_stream.clone elt.data in
     let consumed, stream = to_stream elt.data in
     let recipients = recipients_to_forward_paths elt.recipients in
-    let* result = match t.pool with
-      | Some { pool } ->
+    let* result =
+      match t.pool with
+      | Some {pool} ->
         pool @@ fun (encoder, decoder, queue) ->
-          let encoder = Fun.const encoder in
-          let decoder = Fun.const decoder in
-          let queue = Fun.const queue in
-          Sendmail.sendmail ~encoder ~decoder ~queue he ~destination
-            ~cfg:t.tls ~domain:t.info.Ptt_common.domain elt.sender recipients stream
+        let encoder = Fun.const encoder in
+        let decoder = Fun.const decoder in
+        let queue = Fun.const queue in
+        Sendmail.sendmail ~encoder ~decoder ~queue he ~destination ~cfg:t.tls
+          ~domain:t.info.Ptt_common.domain elt.sender recipients stream
       | None ->
-          Sendmail.sendmail he ~destination ~cfg:t.tls
-            ~domain:t.info.Ptt_common.domain elt.sender recipients stream in
-    if not last_option
-    then match result, !consumed with
+        Sendmail.sendmail he ~destination ~cfg:t.tls
+          ~domain:t.info.Ptt_common.domain elt.sender recipients stream in
+    if not last_option then
+      match result, !consumed with
       | Ok (), _ -> Lwt.return `Ok
       | Error _, false -> Lwt.return `Retry
       | Error err, true ->
-          let* forward_path = guess_return_path backup in
-          Lwt.return (`Errored (forward_path, err))
-    else match result with
+        let* forward_path = guess_return_path backup in
+        Lwt.return (`Errored (forward_path, err))
+    else
+      match result with
       | Ok () -> Lwt.return `Ok
-      | Error _ when List.exists ((=) `Ignore) elt.policies -> Lwt.return `Ok
+      | Error _ when List.exists (( = ) `Ignore) elt.policies -> Lwt.return `Ok
       | Error err ->
-          let* forward_path = guess_return_path backup in
-          Lwt.return (`Errored (forward_path, err))
+        let* forward_path = guess_return_path backup in
+        Lwt.return (`Errored (forward_path, err))
 
   let no_mail_exchange_service elt =
     let ( let* ) = Lwt.bind in
     let* forward_path = guess_return_path (Lwt_stream.clone elt.data) in
     match forward_path with
     | None ->
-        let recipients = recipients_to_forward_paths elt.recipients in
-        Log.err (fun m -> m "Impossible to send the email %a to @[<hov>%a@] \
-          and impossible to find a return-path to notify the sender %a"
-          Mrmime.MessageID.pp elt.id
-          Fmt.(list ~sep:(any ",") Colombe.Forward_path.pp) recipients
-          Colombe.Reverse_path.pp elt.sender);
-        Lwt.return_unit
+      let recipients = recipients_to_forward_paths elt.recipients in
+      Log.err (fun m ->
+          m
+            "Impossible to send the email %a to @[<hov>%a@] and impossible to \
+             find a return-path to notify the sender %a"
+            Mrmime.MessageID.pp elt.id
+            Fmt.(list ~sep:(any ",") Colombe.Forward_path.pp)
+            recipients Colombe.Reverse_path.pp elt.sender);
+      Lwt.return_unit
     | Some _forward_path -> assert false (* TODO *)
 
   let pp_error ppf = function
@@ -146,73 +165,81 @@ module Make
   let error_while_sending_email elt (forward_path, err) =
     match forward_path with
     | None ->
-        let recipients = recipients_to_forward_paths elt.recipients in
-        Log.err (fun m -> m "Got an error while sending email %a to \
-          @[<hov>%a@] and impossible to find a return-path to notify the 
-          sender %a: %a" Mrmime.MessageID.pp elt.id
-          Fmt.(list ~sep:(any ",") Colombe.Forward_path.pp) recipients
-          Colombe.Reverse_path.pp elt.sender
-          pp_error err);
-        Lwt.return_unit
+      let recipients = recipients_to_forward_paths elt.recipients in
+      Log.err (fun m ->
+          m
+            "Got an error while sending email %a to @[<hov>%a@] and impossible \
+             to find a return-path to notify the \n\
+            \          sender %a: %a" Mrmime.MessageID.pp elt.id
+            Fmt.(list ~sep:(any ",") Colombe.Forward_path.pp)
+            recipients Colombe.Reverse_path.pp elt.sender pp_error err);
+      Lwt.return_unit
     | Some _forward_path -> assert false (* TODO *)
 
   let sendmail dns he t elt =
     let ( let* ) = Lwt.bind in
     let open Ptt_common in
-    begin match elt.recipients.domain with
+    begin
+      match elt.recipients.domain with
       | `Ipaddr ipaddr ->
         let domain = Ipaddr.to_domain_name ipaddr in
         Lwt.return_ok Mxs.(v ~preference:0 ~domain ipaddr)
-      | `Domain domain ->
+      | `Domain domain -> (
         let* r = t.resolver.getmxbyname dns domain in
         match r with
         | Ok mxs ->
-            let resolve = (Fun.flip Lwt_list.fold_left_s [] )
-              begin fun acc ({ Dns.Mx.mail_exchange; _ } as mx) ->
-                let* r = t.resolver.gethostbyname dns mail_exchange in
-                match r with
-                | Ok ipaddr -> Lwt.return ((mx, ipaddr) :: acc)
-                | Error (`Msg msg) ->
-                  warn_about_an_unreachable_mail_exchange ~domain ~mail_exchange msg;
-                  Lwt.return acc end in
-            resolve (Dns.Rr_map.Mx_set.elements mxs) >|= Mxs.vs >|= Result.ok
-        | Error _ as err -> Lwt.return err end >>= function
+          let resolve =
+            (Fun.flip Lwt_list.fold_left_s [])
+              begin
+                fun acc ({Dns.Mx.mail_exchange; _} as mx) ->
+                  let* r = t.resolver.gethostbyname dns mail_exchange in
+                  match r with
+                  | Ok ipaddr -> Lwt.return ((mx, ipaddr) :: acc)
+                  | Error (`Msg msg) ->
+                    warn_about_an_unreachable_mail_exchange ~domain
+                      ~mail_exchange msg;
+                    Lwt.return acc
+              end in
+          resolve (Dns.Rr_map.Mx_set.elements mxs) >|= Mxs.vs >|= Result.ok
+        | Error _ as err -> Lwt.return err)
+    end
+    >>= function
     | Error _ -> no_mail_exchange_service elt
     | Ok mxs ->
-      if Mxs.is_empty mxs
-      then no_mail_exchange_service elt
+      if Mxs.is_empty mxs then no_mail_exchange_service elt
       else
         let mxs = Mxs.bindings mxs in
         let rec go = function
           | [] ->
-              (* NOTE(dinosaure): we verified that [mxs] contains at least one
-                 field and we catch up the case when we have the last element
-                 of [mxs] which does not do the recursion. This case should
-                 never occur. *)
-              assert false
-          | [ _mx, ipaddr ] ->
+            (* NOTE(dinosaure): we verified that [mxs] contains at least one
+               field and we catch up the case when we have the last element
+               of [mxs] which does not do the recursion. This case should
+               never occur. *)
+            assert false
+          | [(_mx, ipaddr)] ->
             let* result = sendmail ~last_option:true he t ~ipaddr elt in
-            begin match result with
-            | `Retry | `Ok -> Lwt.return_unit
-            | `Errored value -> error_while_sending_email elt value end
-          | (_mx, ipaddr) :: mxs ->
+            begin
+              match result with
+              | `Retry | `Ok -> Lwt.return_unit
+              | `Errored value -> error_while_sending_email elt value
+            end
+          | (_mx, ipaddr) :: mxs -> (
             let* result = sendmail he t ~ipaddr elt in
             match result with
             | `Ok -> Lwt.return_unit
             | `Retry -> go mxs
-            | `Errored value -> error_while_sending_email elt value in
+            | `Errored value -> error_while_sending_email elt value) in
         go mxs
 
   let rec job dns he t =
     Lwt_stream.get t.stream >>= function
-    | Some elt ->
-      sendmail dns he t elt >>= fun () ->
-      job dns he t
+    | Some elt -> sendmail dns he t elt >>= fun () -> job dns he t
     | None -> Lwt.return_unit
 
-  let v
-    : resolver:_ -> ?pool:pool -> info:Ptt_common.info -> Tls.Config.client -> _
-    = fun ~resolver ?pool ~info tls ->
+  let v :
+      resolver:_ -> ?pool:pool -> info:Ptt_common.info -> Tls.Config.client -> _
+      =
+   fun ~resolver ?pool ~info tls ->
     let stream, push = Lwt_stream.create () in
-    { stream; push; info; resolver; tls; pool }, push
+    {stream; push; info; resolver; tls; pool}, push
 end
File "lib/submission.ml", line 1, characters 0-0:
diff --git a/_build/default/lib/submission.ml b/_build/default/lib/.formatted/submission.ml
index cebc75f..47f1973 100644
--- a/_build/default/lib/submission.ml
+++ b/_build/default/lib/.formatted/submission.ml
@@ -2,7 +2,6 @@ open Rresult
 open Lwt.Infix
 
 let ( >>? ) = Lwt_result.bind
-
 let src = Logs.Src.create "ptt.submission"
 
 module Log = (val Logs.src_log src : Logs.LOG)
@@ -12,27 +11,31 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
   module TLS = Ptt_flow.Make (Tls_flow)
   module TCP = Ptt_flow.Make (Stack.TCP)
 
-  type 'k server =
-    { info: info
+  type 'k server = {
+      info: info
     ; messaged: Messaged.t
-    ; push: ((Messaged.key * string Lwt_stream.t) option -> unit)
+    ; push: (Messaged.key * string Lwt_stream.t) option -> unit
     ; mechanisms: Mechanism.t list
     ; authenticator: 'k Authentication.t
-    ; mutable count: int64 }
+    ; mutable count: int64
+  }
 
-  and info = SSMTP.info =
-    { domain: Colombe.Domain.t
+  and info = SSMTP.info = {
+      domain: Colombe.Domain.t
     ; ipaddr: Ipaddr.t
     ; tls: Tls.Config.server option
     ; zone: Mrmime.Date.Zone.t
-    ; size: int64 }
+    ; size: int64
+  }
 
   let info {info; _} = info
 
   let create ~info ~authenticator mechanisms =
     let messaged, push = Lwt_stream.create () in
     let close () = push None in
-    {info; messaged; push; mechanisms; authenticator; count= 0L}, messaged, close
+    ( {info; messaged; push; mechanisms; authenticator; count= 0L}
+    , messaged
+    , close )
 
   let succ server =
     let v = server.count in
@@ -46,9 +49,13 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
     | `Flow of string
     | `Invalid_recipients ]
 
-  type 'err runner = Runner :
-    { run : 'a. 'flow -> ('a, 'err) Colombe.State.t -> ('a, 'err) result Lwt.t
-    ; flow : 'flow } -> 'err runner
+  type 'err runner =
+    | Runner : {
+          run:
+            'a. 'flow -> ('a, 'err) Colombe.State.t -> ('a, 'err) result Lwt.t
+        ; flow: 'flow
+      }
+        -> 'err runner
 
   let flowf fmt = Fmt.kstr (fun str -> `Flow str) fmt
 
@@ -59,18 +66,26 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
     | `Flow msg -> Fmt.pf ppf "Error at the protocol level: %s" msg
     | `Invalid_recipients -> Fmt.string ppf "Invalid recipients"
 
-  let authentication ctx ~domain_from (Runner { run; flow; })
-    random hash server ?payload mechanism =
+  let authentication
+      ctx
+      ~domain_from
+      (Runner {run; flow})
+      random
+      hash
+      server
+      ?payload
+      mechanism =
     let rec go limit ?payload m =
       if limit >= 3 then
         let e = `Too_many_tries in
-        let m = SSMTP.m_properly_close_and_fail ctx ~message:"Too many tries" e in
+        let m =
+          SSMTP.m_properly_close_and_fail ctx ~message:"Too many tries" e in
         run flow m
       else
         match m, payload with
         | Mechanism.PLAIN, Some v -> begin
-          Authentication.decode_authentication hash
-            (Authentication.PLAIN None) server.authenticator v
+          Authentication.decode_authentication hash (Authentication.PLAIN None)
+            server.authenticator v
           >>= function
           | Ok (user, true) ->
             let m = SSMTP.(Monad.send ctx Value.PP_235 ["Accepted, buddy!"]) in
@@ -93,7 +108,9 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
               go (limit + 1) m
             | `Authentication_with_payload (_domain_from, m, payload) ->
               (* assert (_domain_from = domain_from) ; *)
-              go (limit + 1) ~payload m end end
+              go (limit + 1) ~payload m
+          end
+        end
         | Mechanism.PLAIN, None -> begin
           let stamp = Bytes.create 0x10 in
           Mirage_crypto_rng.generate_into ?g:random stamp 0x10;
@@ -111,9 +128,8 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
           >>= function
           | Ok (user, true) ->
             let m = SSMTP.(Monad.send ctx Value.PP_235 ["Accepted, buddy!"]) in
-            run flow m >>? fun () ->
-            Lwt.return_ok (`Authenticated user)
-          | (Error _ | Ok (_, false)) as res ->
+            run flow m >>? fun () -> Lwt.return_ok (`Authenticated user)
+          | (Error _ | Ok (_, false)) as res -> (
             let () =
               match res with
               | Error (`Msg err) ->
@@ -131,7 +147,8 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
               go (limit + 1) m
             | `Authentication_with_payload (_domain_from, m, payload) ->
               (* assert (_domain_from = domain_from) ; *)
-              go (limit + 1) ~payload m end in
+              go (limit + 1) ~payload m)
+        end in
     go 1 ?payload mechanism
 
   type authentication =
@@ -140,7 +157,8 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
 
   let dot = ".\r\n"
 
-  let receive_mail ?(limit = 0x100000) (Runner { run; flow}) ctx m bounded_stream =
+  let receive_mail ?(limit = 0x100000) (Runner {run; flow}) ctx m bounded_stream
+      =
     let rec go count () =
       if count >= limit then Lwt.return_error `Too_big_data
       else
@@ -150,9 +168,7 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
         | str ->
           let len = String.length str in
           let str = str ^ "\r\n" in
-          bounded_stream#push str >>=
-          go (count + len + 2)
-    in
+          bounded_stream#push str >>= go (count + len + 2) in
     go 0 ()
 
   let accept :
@@ -169,17 +185,19 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
    fun ?encoder ?decoder ~ipaddr flow dns resolver random hash server ->
     let ctx = Colombe.State.Context.make ?encoder ?decoder () in
     let m = SSMTP.m_submission_init ctx server.info server.mechanisms in
-    begin match server.info.SSMTP.tls with
-    | None -> Lwt.return_ok (Runner { run= TCP.run; flow= TCP.make flow })
-    | Some tls ->
+    begin
+      match server.info.SSMTP.tls with
+      | None -> Lwt.return_ok (Runner {run= TCP.run; flow= TCP.make flow})
+      | Some tls ->
         Tls_flow.server_of_flow tls flow
         >|= Result.map_error (flowf "%a" Tls_flow.pp_write_error)
         >>? fun flow ->
-        Lwt.return_ok (Runner { run= TLS.run; flow= TLS.make flow }) end
-    >>? fun (Runner { run; flow} as runner) ->
+        Lwt.return_ok (Runner {run= TLS.run; flow= TLS.make flow})
+    end
+    >>? fun (Runner {run; flow} as runner) ->
     run flow m >>? function
     | `Quit -> Lwt.return_ok ()
-    | #authentication as auth ->
+    | #authentication as auth -> (
       let domain_from, m, payload =
         match auth with
         | `Authentication_with_payload (domain_from, m, v) ->
@@ -188,18 +206,21 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
       authentication ctx ~domain_from runner random hash server ?payload m
       >>? function
       | `Quit -> Lwt.return_ok ()
-      | `Authenticated user ->
+      | `Authenticated user -> (
         let m = SSMTP.m_relay ctx ~domain_from in
         run flow m >>? function
         | `Quit -> Lwt.return_ok ()
-        | `Send {SSMTP.domain_from; recipients; from; _} ->
+        | `Send {SSMTP.domain_from; recipients; from; _} -> (
           Ptt_common.recipients_are_reachable ~info:server.info dns resolver
             (List.map fst recipients)
           >>= function
           | true -> begin
             let id = succ server in
             let from =
-              let sender = Colombe.Path.{ local= user; domain= server.info.SSMTP.domain; rest= [] } in
+              let sender =
+                Colombe.Path.
+                  {local= user; domain= server.info.SSMTP.domain; rest= []}
+              in
               Some sender, snd from in
             let key = Messaged.key ~domain_from ~from ~recipients ~ipaddr id in
             let stream, bounded_stream = Lwt_stream.create_bounded 0x7ff in
@@ -214,9 +235,12 @@ module Make (Stack : Tcpip.Stack.V4V6) = struct
               bounded_stream
             >>? fun () ->
             let m = SSMTP.m_end ctx in
-            run flow m >>? fun `Quit -> Lwt.return_ok () end
+            run flow m >>? fun `Quit -> Lwt.return_ok ()
+          end
           | false ->
             let e = `Invalid_recipients in
-            let m = SSMTP.m_properly_close_and_fail ctx ~message:"No valid recipients" e in
-            run flow m
+            let m =
+              SSMTP.m_properly_close_and_fail ctx ~message:"No valid recipients"
+                e in
+            run flow m)))
 end
File "test/test.ml", line 1, characters 0-0:
diff --git a/_build/default/test/test.ml b/_build/default/test/.formatted/test.ml
index ebe47b6..34f2b85 100644
--- a/_build/default/test/test.ml
+++ b/_build/default/test/.formatted/test.ml
@@ -7,9 +7,7 @@ let () = Logs.set_level ~all:true (Some Logs.Debug)
 
 let reporter ppf =
   let report src level ~over k msgf =
-    let k _ =
-      over () ;
-      k () in
+    let k _ = over (); k () in
     let with_metadata header _tags k ppf fmt =
       Format.kfprintf k ppf
         ("%a[%a]: " ^^ fmt ^^ "\n%!")
@@ -17,7 +15,7 @@ let reporter ppf =
         Fmt.(styled `Magenta string)
         (Logs.Src.name src) in
     msgf @@ fun ?header ?tags fmt -> with_metadata header tags k ppf fmt in
-  { Logs.report }
+  {Logs.report}
 
 let () = Logs.set_reporter (reporter Fmt.stderr)
 let () = Mirage_crypto_rng_unix.initialize (module Mirage_crypto_rng.Fortuna)
@@ -75,7 +73,8 @@ let auth0 =
     |> Map.add Local.(v [w "hannes"]) Digestif.(digest_string SHA1 "titi")
     |> Map.add Local.(v [w "gemma"]) Digestif.(digest_string SHA1 "") in
   let f username password =
-    let username = match username with
+    let username =
+      match username with
       | `Dot_string vs -> List.map (fun x -> `Atom x) vs
       | `String _ -> assert false in
     match Map.find username m with
@@ -89,52 +88,75 @@ let authentication_test_0 =
   let auth hash mechanism authenticator fmt =
     Fmt.kstr
       (fun payload ->
-        Ptt.Authentication.decode_authentication hash mechanism
-          authenticator
+        Ptt.Authentication.decode_authentication hash mechanism authenticator
           (Base64.encode_exn payload))
       fmt in
   let plain_none = Ptt.Authentication.PLAIN None in
-  auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "romain.calascibetta" "toto"
-  >|= Result.map snd >>= fun romain ->
+  auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "romain.calascibetta"
+    "toto"
+  >|= Result.map snd
+  >>= fun romain ->
   Alcotest.(check (result bool msg)) "romain" (Ok true) romain;
   auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "thomas" "tata"
-  >|= Result.map snd >>= fun thomas ->
+  >|= Result.map snd
+  >>= fun thomas ->
   Alcotest.(check (result bool msg)) "thomas" (Ok true) thomas;
   auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "anil" "tutu"
-  >|= Result.map snd >>= fun anil ->
+  >|= Result.map snd
+  >>= fun anil ->
   Alcotest.(check (result bool msg)) "anil" (Ok true) anil;
   auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "hannes" "titi"
-  >|= Result.map snd >>= fun hannes ->
+  >|= Result.map snd
+  >>= fun hannes ->
   Alcotest.(check (result bool msg)) "hannes" (Ok true) hannes;
   auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "gemma" ""
-  >|= Result.map snd >>= fun gemma ->
+  >|= Result.map snd
+  >>= fun gemma ->
   Alcotest.(check (result bool msg)) "gemma" (Ok true) gemma;
-  auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "romain.calascibetta" "titi"
-  >|= Result.map snd >>= fun wrong ->
+  auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "romain.calascibetta"
+    "titi"
+  >|= Result.map snd
+  >>= fun wrong ->
   Alcotest.(check (result bool msg)) "romain (wrong)" (Ok false) wrong;
   auth Digestif.SHA1 plain_none auth0 "\000%s\000%s" "pierre.caillou" "toto"
-  >|= Result.map snd >>= fun pierre ->
+  >|= Result.map snd
+  >>= fun pierre ->
   Alcotest.(check (result bool msg)) "pierre" (Ok false) pierre;
-  auth Digestif.SHA1 plain_none auth0 "stamp\000%s\000%s" "romain.calascibetta" "toto"
-  >|= Result.map snd >>= fun bad_stamp ->
-  Alcotest.(check (result bool msg)) "bad stamp" (Error (`Msg "Unexpected stamp")) bad_stamp;
-  auth Digestif.SHA1 plain_none auth0 "salut les copains"
-  >|= Result.map snd >>= fun malformed ->
-  Alcotest.(check (result bool msg)) "malformed" (Error (`Msg "Invalid input")) malformed;
-  auth Digestif.SHA1 (Ptt.Authentication.PLAIN (Some "stamp")) auth0 "\000%s\000%s" "anil" "tutu"
-  >|= Result.map snd >>= fun invalid_stamp ->
-  Alcotest.(check (result bool msg)) "no stamp" (Error (`Msg "Invalid stamp")) invalid_stamp;
-  auth Digestif.SHA1 plain_none auth0 "\000\000%s" "tutu"
-  >|= Result.map snd >>= fun invalid_username ->
-  Alcotest.(check (result bool msg)) "invalid username" (Error (`Msg "Invalid username: \"\"")) invalid_username;
+  auth Digestif.SHA1 plain_none auth0 "stamp\000%s\000%s" "romain.calascibetta"
+    "toto"
+  >|= Result.map snd
+  >>= fun bad_stamp ->
+  Alcotest.(check (result bool msg))
+    "bad stamp"
+    (Error (`Msg "Unexpected stamp"))
+    bad_stamp;
+  auth Digestif.SHA1 plain_none auth0 "salut les copains" >|= Result.map snd
+  >>= fun malformed ->
+  Alcotest.(check (result bool msg))
+    "malformed"
+    (Error (`Msg "Invalid input"))
+    malformed;
+  auth Digestif.SHA1 (Ptt.Authentication.PLAIN (Some "stamp")) auth0
+    "\000%s\000%s" "anil" "tutu"
+  >|= Result.map snd
+  >>= fun invalid_stamp ->
+  Alcotest.(check (result bool msg))
+    "no stamp"
+    (Error (`Msg "Invalid stamp"))
+    invalid_stamp;
+  auth Digestif.SHA1 plain_none auth0 "\000\000%s" "tutu" >|= Result.map snd
+  >>= fun invalid_username ->
+  Alcotest.(check (result bool msg))
+    "invalid username"
+    (Error (`Msg "Invalid username: \"\""))
+    invalid_username;
   Lwt.return_unit
 
-let x25519 = Colombe.Domain.(Domain [ "x25519"; "net" ])
-let gmail = Colombe.Domain.(Domain [ "gmail"; "com" ])
+let x25519 = Colombe.Domain.(Domain ["x25519"; "net"])
+let gmail = Colombe.Domain.(Domain ["gmail"; "com"])
 let recoil = Domain_name.(host_exn <.> of_string_exn) "recoil.org"
 let nqsb = Domain_name.(host_exn <.> of_string_exn) "nqsb.io"
 let gazagnaire = Domain_name.(host_exn <.> of_string_exn) "gazagnaire.org"
-
 let put_crlf x = x ^ "\r\n"
 
 let rdwr_from_flows inputs outputs =
@@ -213,14 +235,11 @@ let smtp_test_0 =
 let smtp_test_1 =
   Alcotest_lwt.test_case "SMTP (relay) 1" `Quick @@ fun _sw () ->
   let rdwr, check =
-    rdwr_from_flows
-      [ "EHLO gmail.com"; "QUIT" ]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250 SIZE 16777216"
-      ; "221 Bye, buddy!" ] in
+    rdwr_from_flows ["EHLO gmail.com"; "QUIT"]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250 SIZE 16777216"; "221 Bye, buddy!"
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -245,16 +264,12 @@ let smtp_test_2 =
   Alcotest_lwt.test_case "SMTP (relay) 2" `Quick @@ fun _sw () ->
   let rdwr, check =
     rdwr_from_flows
-      [ "EHLO gmail.com"
-      ; "RSET"
-      ; "QUIT" ]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250 SIZE 16777216"
-      ; "250 Yes buddy!"
-      ; "221 Bye, buddy!" ] in
+      ["EHLO gmail.com"; "RSET"; "QUIT"]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250 SIZE 16777216"; "250 Yes buddy!"
+      ; "221 Bye, buddy!"
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -279,23 +294,22 @@ let smtp_test_3 =
   Alcotest_lwt.test_case "SMTP (relay) 3" `Quick @@ fun _sw () ->
   let rdwr, check =
     rdwr_from_flows
-      [ "EHLO gmail.com"
+      [
+        "EHLO gmail.com"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"
       ; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"
       ; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"
-      ; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET"; "RSET" ]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250 SIZE 16777216"
+      ]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250 SIZE 16777216"; "250 Yes buddy!"
       ; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"
       ; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"
       ; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"
       ; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"
       ; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"
       ; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"; "250 Yes buddy!"
-      ; "250 Yes buddy!"
-      ; "554 You reached the limit buddy!" ] in
+      ; "554 You reached the limit buddy!"
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -320,16 +334,12 @@ let smtp_test_4 =
   Alcotest_lwt.test_case "SMTP (relay) 4" `Quick @@ fun _sw () ->
   let rdwr, check =
     rdwr_from_flows
-      [ "EHLO gmail.com"
-      ; "MAIL FROM:<romain.calascibetta@gmail.com>"
-      ; "DATA"]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250 SIZE 16777216"
-      ; "250 Ok, buddy!"
-      ; "554 No recipients" ] in
+      ["EHLO gmail.com"; "MAIL FROM:<romain.calascibetta@gmail.com>"; "DATA"]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250 SIZE 16777216"; "250 Ok, buddy!"
+      ; "554 No recipients"
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -362,16 +372,15 @@ let smtp_test_5 =
   Alcotest_lwt.test_case "SMTP (relay) 5" `Quick @@ fun _sw () ->
   let rdwr, check =
     rdwr_from_flows
-      [ "EHLO gmail.com"
-      ; "MAIL FROM:<romain.calascibetta@gmail.com>"
-      ; "RCPT TO:<anil@recoil.org>"; "DATA" ]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250 SIZE 16777216"
+      [
+        "EHLO gmail.com"; "MAIL FROM:<romain.calascibetta@gmail.com>"
+      ; "RCPT TO:<anil@recoil.org>"; "DATA"
+      ]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250 SIZE 16777216"; "250 Ok, buddy!"
       ; "250 Ok, buddy!"
-      ; "250 Ok, buddy!" ] in
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -415,17 +424,12 @@ let smtp_test_6 =
   Alcotest_lwt.test_case "SMTP (submission) 6" `Quick @@ fun _sw () ->
   let rdwr, check =
     rdwr_from_flows
-      [ "EHLO gmail.com"
-      ; "MAIL FROM:<romain.calascibetta@gmail.com>"
-      ; "QUIT" ]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250-SIZE 16777216"
-      ; "250 AUTH PLAIN"
-      ; "530 Authentication required, buddy!"
-      ; "221 Bye, buddy!" ] in
+      ["EHLO gmail.com"; "MAIL FROM:<romain.calascibetta@gmail.com>"; "QUIT"]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250-SIZE 16777216"; "250 AUTH PLAIN"
+      ; "530 Authentication required, buddy!"; "221 Bye, buddy!"
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -453,14 +457,11 @@ let smtp_test_7 =
   Alcotest_lwt.test_case "SMTP (submission) 7" `Quick @@ fun _sw () ->
   let rdwr, check =
     rdwr_from_flows
-      [ "EHLO gmail.com"
-      ; "AUTH PLAIN" ]
-      [ "220 x25519.net"
-      ; "250-x25519.net at your service, [127.0.0.1]"
-      ; "250-8BITMIME"
-      ; "250-SMTPUTF8"
-      ; "250-SIZE 16777216"
-      ; "250 AUTH PLAIN" ] in
+      ["EHLO gmail.com"; "AUTH PLAIN"]
+      [
+        "220 x25519.net"; "250-x25519.net at your service, [127.0.0.1]"
+      ; "250-8BITMIME"; "250-SMTPUTF8"; "250-SIZE 16777216"; "250 AUTH PLAIN"
+      ] in
   let ctx = Colombe.State.Context.make () in
   let info =
     {
@@ -506,7 +507,7 @@ let resolver =
     | None ->
       let err = Rresult.R.error_msgf "%a not found" Domain_name.pp domain_name in
       Lwt.return err in
-  { getmxbyname; gethostbyname }
+  {getmxbyname; gethostbyname}
 
 let make_smtp_server ?stop ~port tbl info stack =
   let open Lwt.Infix in
@@ -523,7 +524,8 @@ let make_smtp_server ?stop ~port tbl info stack =
       >>= function
       | Ok () -> Lwt.return ()
       | Error (`Msg err) ->
-        Logs.err (fun m -> m "<%a:%d> raised an error: %s" Ipaddr.pp ipaddr port err);
+        Logs.err (fun m ->
+            m "<%a:%d> raised an error: %s" Ipaddr.pp ipaddr port err);
         Lwt.return () in
     Server.init ~port stack >|= fun service ->
     Server.serve_when_ready ?stop ~handler service in
@@ -531,11 +533,12 @@ let make_smtp_server ?stop ~port tbl info stack =
   let th = th >|= close in
   `Initialized th, stream0
 
-module Happy_eyeballs_daemon = Happy_eyeballs_mirage.Make
-  (Time) (Mclock) (Tcpip_stack_socket.V4V6)
+module Happy_eyeballs_daemon =
+  Happy_eyeballs_mirage.Make (Time) (Mclock) (Tcpip_stack_socket.V4V6)
 
-module Sendmail = Sendmail_mirage.Make
-  (Pclock) (Tcpip_stack_socket.V4V6.TCP) (Happy_eyeballs_daemon)
+module Sendmail =
+  Sendmail_mirage.Make (Pclock) (Tcpip_stack_socket.V4V6.TCP)
+    (Happy_eyeballs_daemon)
 
 let sendmail he ipaddr port ~domain sender recipients contents =
   let open Lwt.Infix in
@@ -546,8 +549,8 @@ let sendmail he ipaddr port ~domain sender recipients contents =
     Lwt_stream.get stream >|= function
     | Some str -> Some (str, 0, String.length str)
     | None -> None in
-  Sendmail.sendmail he ~destination ~port ~domain
-    sender recipients mail >>= function
+  Sendmail.sendmail he ~destination ~port ~domain sender recipients mail
+  >>= function
   | Ok () -> Lwt.return_unit
   | Error (`Msg msg) -> Fmt.failwith "%s" msg
   | Error (#Sendmail_with_starttls.error as err) ->
@@ -560,7 +563,8 @@ let full_test_0 =
   let romain_calascibetta =
     let open Mrmime.Mailbox in
     (Rresult.R.get_ok <.> Colombe_emile.to_forward_path)
-      (Local.[w "romain"; w "calascibetta"] @ Domain.(domain, [a "gmail"; a "com"])) in
+      (Local.[w "romain"; w "calascibetta"]
+      @ Domain.(domain, [a "gmail"; a "com"])) in
   let anil =
     let open Mrmime.Mailbox in
     (Rresult.R.get_ok <.> Colombe_emile.to_reverse_path)
@@ -569,8 +573,10 @@ let full_test_0 =
   let ipv4_only = false and ipv6_only = false in
   let open Lwt.Infix in
   let open Tcpip_stack_socket.V4V6 in
-  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun tcpv4v6 ->
-  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun udpv4v6 ->
+  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun tcpv4v6 ->
+  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun udpv4v6 ->
   connect udpv4v6 tcpv4v6 >>= fun stack ->
   let he = Happy_eyeballs_daemon.create stack in
   let sendmail contents =
@@ -581,26 +587,32 @@ let full_test_0 =
   let open Lwt.Infix in
   let tbl = Hashtbl.create 0 in
   make_smtp_server ~stop ~port:8888 tbl
-    { Ptt.SMTP.domain= gmail
+    {
+      Ptt.SMTP.domain= gmail
     ; ipaddr= Ipaddr.(V4 V4.localhost)
     ; tls= None
     ; zone= Mrmime.Date.Zone.GMT
-    ; size= 0x1000000L } tcpv4v6
+    ; size= 0x1000000L
+    }
+    tcpv4v6
   >>= fun (`Initialized th, stream) ->
   let sendmail =
     sendmail
-      [ "From: anil@recoil.org"
-      ; "Subject: SMTP server, PLZ!"
-      ; ""
-      ; "Hello World!" ] >>= fun () ->
+      [
+        "From: anil@recoil.org"; "Subject: SMTP server, PLZ!"; ""; "Hello World!"
+      ]
+    >>= fun () ->
     Logs.debug (fun m -> m "Close the SMTP server");
     Lwt_switch.turn_off stop in
-  Lwt.join [ sendmail; th ] >>= fun () ->
+  Lwt.join [sendmail; th] >>= fun () ->
   Lwt_stream.to_list stream >|= List.map fst >>= fun inbox ->
-  Alcotest.(check (list key)) "inbox" inbox
-    [ Ptt.Messaged.key ~domain_from:recoil ~from:(anil, [])
+  Alcotest.(check (list key))
+    "inbox" inbox
+    [
+      Ptt.Messaged.key ~domain_from:recoil ~from:(anil, [])
         ~recipients:[romain_calascibetta, []]
-        ~ipaddr:(Ipaddr.V4 Ipaddr.V4.localhost) 0L ];
+        ~ipaddr:(Ipaddr.V4 Ipaddr.V4.localhost) 0L
+    ];
   Lwt.return_unit
 
 let full_test_1 =
@@ -609,7 +621,8 @@ let full_test_1 =
   let romain_calascibetta =
     let open Mrmime.Mailbox in
     (Rresult.R.get_ok <.> Colombe_emile.to_forward_path)
-      (Local.[w "romain"; w "calascibetta"] @ Domain.(domain, [a "gmail"; a "com"])) in
+      (Local.[w "romain"; w "calascibetta"]
+      @ Domain.(domain, [a "gmail"; a "com"])) in
   let anil =
     let open Mrmime.Mailbox in
     (Rresult.R.get_ok <.> Colombe_emile.to_reverse_path)
@@ -619,64 +632,68 @@ let full_test_1 =
     (Rresult.R.get_ok <.> Colombe_emile.to_reverse_path)
       (Local.[w "thomas"] @ Domain.(domain, [a "gazagnaire"; a "org"])) in
   let recoil = (Colombe.Domain.of_string_exn <.> Domain_name.to_string) recoil in
-  let gazagnaire = (Colombe.Domain.of_string_exn <.> Domain_name.to_string) gazagnaire in
+  let gazagnaire =
+    (Colombe.Domain.of_string_exn <.> Domain_name.to_string) gazagnaire in
   let ipv4_only = false and ipv6_only = false in
   let open Lwt.Infix in
   let open Tcpip_stack_socket.V4V6 in
-  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun tcpv4v6 ->
-  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None >>= fun udpv4v6 ->
+  TCP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun tcpv4v6 ->
+  UDP.connect ~ipv4_only ~ipv6_only Ipaddr.V4.Prefix.global None
+  >>= fun udpv4v6 ->
   connect udpv4v6 tcpv4v6 >>= fun stack ->
   let he = Happy_eyeballs_daemon.create stack in
   let stop = Lwt_switch.create () in
   let open Lwt.Infix in
   let tbl = Hashtbl.create 0 in
   make_smtp_server ~stop ~port:4444 tbl
-    { Ptt.SMTP.domain= gmail
+    {
+      Ptt.SMTP.domain= gmail
     ; ipaddr= Ipaddr.(V4 V4.localhost)
     ; tls= None
     ; zone= Mrmime.Date.Zone.GMT
-    ; size= 0x1000000L } tcpv4v6
+    ; size= 0x1000000L
+    }
+    tcpv4v6
   >>= fun (`Initialized th, stream) ->
   let sendmail ~domain sender contents =
-    sendmail he Ipaddr.(V4 V4.localhost)
+    sendmail he
+      Ipaddr.(V4 V4.localhost)
       4444 ~domain sender [romain_calascibetta] contents in
   let sendmail =
     sendmail ~domain:recoil anil
-      [ "From: anil@recoil.org"
-      ; "Subject: SMTP server, PLZ!"
-      ; ""
-      ; "Hello World!" ]
+      [
+        "From: anil@recoil.org"; "Subject: SMTP server, PLZ!"; ""; "Hello World!"
+      ]
     >>= fun () ->
     sendmail ~domain:gazagnaire thomas
-      [ "From: anil@recoil.org"
-      ; "Subject: SMTP server, PLZ!"
-      ; ""
-      ; "Hello World!" ]
+      [
+        "From: anil@recoil.org"; "Subject: SMTP server, PLZ!"; ""; "Hello World!"
+      ]
     >>= fun () -> Lwt_switch.turn_off stop in
-  Lwt.join [ sendmail; th ] >>= fun () ->
+  Lwt.join [sendmail; th] >>= fun () ->
   Lwt_stream.to_list stream >|= List.map fst >|= List.rev >>= fun inbox ->
   Alcotest.(check (list key))
     "inbox" inbox
-    [ Ptt.Messaged.key ~domain_from:gazagnaire ~from:(thomas, [])
+    [
+      Ptt.Messaged.key ~domain_from:gazagnaire ~from:(thomas, [])
         ~recipients:[romain_calascibetta, []]
         ~ipaddr:(Ipaddr.V4 Ipaddr.V4.localhost) 1L
     ; Ptt.Messaged.key ~domain_from:recoil ~from:(anil, [])
         ~recipients:[romain_calascibetta, []]
-        ~ipaddr:(Ipaddr.V4 Ipaddr.V4.localhost) 0L ];
+        ~ipaddr:(Ipaddr.V4 Ipaddr.V4.localhost) 0L
+    ];
   Lwt.return_unit
 
 let fiber =
   Alcotest_lwt.run "ptt"
-    [ "mechanism", [mechanism_test_0]
-    ; "authentication", [authentication_test_0]
-    ; "SMTP", [ smtp_test_0
-              ; smtp_test_1
-              ; smtp_test_2
-              ; smtp_test_3
-              ; smtp_test_4
-              ; smtp_test_5
-              ; smtp_test_6
-              ; smtp_test_7 ]
-    ; "server", [full_test_0; full_test_1] ]
+    [
+      "mechanism", [mechanism_test_0]; "authentication", [authentication_test_0]
+    ; ( "SMTP"
+      , [
+          smtp_test_0; smtp_test_1; smtp_test_2; smtp_test_3; smtp_test_4
+        ; smtp_test_5; smtp_test_6; smtp_test_7
+        ] ); "server", [full_test_0; full_test_1]
+    ]
 
 let () = Lwt_main.run fiber
dune build @fmt failed
"/usr/bin/env" "bash" "-c" "opam exec -- dune build @fmt --ignore-promoted-rules || (echo "dune build @fmt failed"; exit 2)" failed with exit status 2
2024-10-15 10:31.47: Job failed: Failed: Build failed