diff --git a/src/paperless_mail/mail.py b/src/paperless_mail/mail.py
index d4a6703c6..9ac03db6e 100644
--- a/src/paperless_mail/mail.py
+++ b/src/paperless_mail/mail.py
@@ -476,6 +476,7 @@ class MailAccountHandler(LoggingMixin):
                     f"since guessed mime type {mime_type} is not supported "
                     f"by paperless",
                 )
+        return processed_attachments
 
     def process_eml(
         self,