diff --git a/email_handler.py b/email_handler.py
index bd70b37d..22a16a4d 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -244,7 +244,7 @@ class MailHandler:
                 "",
             )
 
-            return "250 ignored"
+            return "450 ignored"
 
         # remove DKIM-Signature
         if msg["DKIM-Signature"]: