diff --git a/email_handler.py b/email_handler.py
index fd1397b2..283855a2 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -1022,7 +1022,7 @@ def handle_unknown_mailbox(
             alias=alias,
             sender=envelope.mail_from,
             authorize_address_link=authorize_address_link,
-            mailbox_emails=mailbox_emails
+            mailbox_emails=mailbox_emails,
         ),
         render(
             "transactional/reply-must-use-personal-email.html",
@@ -1030,7 +1030,7 @@ def handle_unknown_mailbox(
             alias=alias,
             sender=envelope.mail_from,
             authorize_address_link=authorize_address_link,
-            mailbox_emails=mailbox_emails
+            mailbox_emails=mailbox_emails,
         ),
     )