From f3a3fe33b66c5b685f4d65a839d8a974aa870ab3 Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Sun, 8 Dec 2024 12:13:52 -0500
Subject: [PATCH] Fix message id format

---
 lib/philomena/users/user_notifier.ex | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/lib/philomena/users/user_notifier.ex b/lib/philomena/users/user_notifier.ex
index 8ee56871..96c2e88a 100644
--- a/lib/philomena/users/user_notifier.ex
+++ b/lib/philomena/users/user_notifier.ex
@@ -3,21 +3,25 @@ defmodule Philomena.Users.UserNotifier do
   alias Philomena.Mailer
 
   defp deliver(to, subject, body) do
-    id =
-      :crypto.strong_rand_bytes(16)
-      |> Base.encode16()
-      |> String.downcase()
-
     Email.new(
       to: to,
       from: {"noreply", mailer_address()},
       subject: subject,
       text_body: body
     )
-    |> Email.header("Message-ID", id)
+    |> Email.header("Message-ID", message_id())
     |> Mailer.deliver_later()
   end
 
+  defp message_id do
+    id =
+      :crypto.strong_rand_bytes(16)
+      |> Base.encode16()
+      |> String.downcase()
+
+    "#{id}.#{mailer_address()}"
+  end
+
   defp mailer_address do
     Application.get_env(:philomena, :mailer_address)
   end