diff --git a/pkgs/servers/web-apps/discourse/mail_receiver/default.nix b/pkgs/servers/web-apps/discourse/mail_receiver/default.nix
new file mode 100644
index 00000000000..c1a3a2df106
--- /dev/null
+++ b/pkgs/servers/web-apps/discourse/mail_receiver/default.nix
@@ -0,0 +1,39 @@
+{ stdenv, lib, fetchFromGitHub, ruby, makeWrapper, replace }:
+
+stdenv.mkDerivation rec {
+  pname = "discourse-mail-receiver";
+  version = "4.0.7";
+
+  src = fetchFromGitHub {
+    owner = "discourse";
+    repo = "mail-receiver";
+    rev = "v${version}";
+    sha256 = "0grifm5qyqazq63va3w26xjqnxwmfixhx0fx0zy7kd39378wwa6i";
+  };
+
+  nativeBuildInputs = [ replace ];
+  buildInputs = [ ruby makeWrapper ];
+
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p $out/bin
+
+    replace-literal -f -r -e /etc/postfix /run/discourse-mail-receiver .
+
+    cp -r receive-mail discourse-smtp-fast-rejection $out/bin/
+    cp -r lib $out/
+
+    wrapProgram $out/bin/receive-mail --set RUBYLIB $out/lib
+    wrapProgram $out/bin/discourse-smtp-fast-rejection --set RUBYLIB $out/lib
+  '';
+
+  meta = with lib; {
+    homepage = "https://www.discourse.org/";
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ talyz ];
+    license = licenses.mit;
+    description = "A helper program which receives incoming mail for Discourse";
+  };
+
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cf9a3349dd5..6ac81ec29ae 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2224,6 +2224,10 @@ in
     ruby = ruby_2_7;
   };
 
+  discourse-mail-receiver = callPackage ../servers/web-apps/discourse/mail_receiver {
+    ruby = ruby_2_7;
+  };
+
   discocss = callPackage ../tools/misc/discocss { };
 
   disfetch = callPackage ../tools/misc/disfetch { };