Well that was silly; additional work on #81.

marrow · Sep 4, 2019 · 9c6e493 · 9c6e493
1 parent 71863ce
commit 9c6e493
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/marrow/mailer/message.py b/marrow/mailer/message.py
@@ -191,7 +191,7 @@ def _build_header_list(self, author, sender):
 		else:
 			headers.extend(self.headers)
 
-		if 'message-id' not in (i[0].lower() for header in headers):
+		if 'message-id' not in (header[0].lower() for header in headers):
 			headers.append('Message-Id', self.id)
 
 		return headers