diff --git a/pkgs/development/python-modules/miltertest/default.nix b/pkgs/development/python-modules/miltertest/default.nix
new file mode 100644
index 000000000000..029f3eca1f6f
--- /dev/null
+++ b/pkgs/development/python-modules/miltertest/default.nix
@@ -0,0 +1,34 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  hatchling,
+  pytestCheckHook,
+}:
+
+buildPythonPackage rec {
+  pname = "miltertest";
+  version = "1.0.0";
+  pyproject = true;
+  __structuredAttrs = true;
+
+  src = fetchFromGitHub {
+    owner = "flowerysong";
+    repo = "miltertest";
+    tag = "v${version}";
+    hash = "sha256-8KpuIR+UxRcJbb2pwKDOkSmyXovlyOa4DpeUDn1oK0Y=";
+  };
+
+  build-system = [ hatchling ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  pythonImportsCheck = [ "miltertest" ];
+
+  meta = {
+    description = "Pure python implementation of the milter protocol";
+    homepage = "https://github.com/flowerysong/miltertest";
+    license = lib.licenses.gpl3Only;
+    maintainers = with lib.maintainers; [ lucasbergman ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 115f30770f75..c327f46069b1 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10465,6 +10465,8 @@ self: super: with self; {
 
   millheater = callPackage ../development/python-modules/millheater { };
 
+  miltertest = callPackage ../development/python-modules/miltertest { };
+
   mim-solvers = callPackage ../development/python-modules/mim-solvers { inherit (pkgs) mim-solvers; };
 
   minari = callPackage ../development/python-modules/minari { };