diff --git a/pkgs/development/ocaml-modules/colombe/sendmail.nix b/pkgs/development/ocaml-modules/colombe/sendmail.nix
new file mode 100644
index 000000000000..639102d95f96
--- /dev/null
+++ b/pkgs/development/ocaml-modules/colombe/sendmail.nix
@@ -0,0 +1,36 @@
+{
+  alcotest,
+  angstrom,
+  base64,
+  buildDunePackage,
+  colombe,
+  hxd,
+  ke,
+  lib,
+  logs,
+  mrmime,
+  rresult,
+  tls,
+}:
+
+buildDunePackage {
+  pname = "sendmail";
+  inherit (colombe) version src;
+  propagatedBuildInputs = [
+    base64
+    colombe
+    logs
+    rresult
+    hxd
+    ke
+    tls
+  ];
+  doCheck = true;
+  checkInputs = [
+    alcotest
+    mrmime
+  ];
+  meta = colombe.meta // {
+    description = "Library to be able to send an email";
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 293b6d6a16dc..5f7839023fe8 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1895,6 +1895,8 @@ let
 
         semver = callPackage ../development/ocaml-modules/semver { };
 
+        sendmail = callPackage ../development/ocaml-modules/colombe/sendmail.nix { };
+
         seq = callPackage ../development/ocaml-modules/seq { };
 
         seqes = callPackage ../development/ocaml-modules/seqes { };