roles/mail/templates/mailman/mailman-web.py.j2

@@ -16,7 +16,8 @@ ALLOWED_HOSTS = [
     #"localhost",  # Archiving API from Mailman, keep it.
     # "lists.your-domain.org",
     # Add here all production URLs you may have.
-    '*'
+    'localhost',
+    '{{ mailman_domain }}'
 ]
 
 # Mailman API credentials