diff --git a/core/mail/protocol.py b/core/mail/protocol.py
index d5bb889..48b446f 100644
--- a/core/mail/protocol.py
+++ b/core/mail/protocol.py
@@ -211,7 +211,7 @@ def receive_email(envelope, log=None):
 
     # handle undelivered mail 'MAILER-DAEMON@'
 
-    if header_from.trim("<>").startswith('MAILER-DAEMON@') and envelope.mail_from.trim("<>") == "":
+    if header_from.strip("<>").startswith('MAILER-DAEMON@') and envelope.mail_from.strip("<>") == "":
         log.warning("Ignoring mailer daemon")
         raise SpecialMailException("Ignoring mailer daemon")
 
@@ -298,6 +298,10 @@ class LMTPHandler:
 
             return '250 Message accepted for delivery'
         except SpecialMailException as e:
+            import uuid
+            random_filename = 'special-' + str(uuid.uuid4())
+            with open(random_filename, 'wb') as f:
+                f.write(content)
             log.warning(f"Special mail exception: {e}")
             return '250 Message accepted for delivery'
         except Exception as e: