save email for debug with error name as prefix

app/email_utils.py

@@ -1399,12 +1399,15 @@ def parse_full_address(full_address) -> (str, str):
     return full_address.display_name, full_address.address
 
 
-def save_email_for_debugging(msg: Message) -> str:
+def save_email_for_debugging(msg: Message, file_name_prefix=None) -> str:
     """Save email for debugging to temporary location
     Return the file path
     """
     if TEMP_DIR:
         file_name = str(uuid.uuid4()) + ".eml"
+        if file_name_prefix:
+            file_name = file_name_prefix + file_name
+
         with open(os.path.join(TEMP_DIR, file_name), "wb") as f:
             f.write(msg.as_bytes())
 

email_handler.py

@@ -2375,13 +2375,16 @@ class MailHandler:
             return status.E524
         except Exception as e:
             LOG.e(
-                "email handling fail with error:%s mail_from:%s, rcpt_tos:%s, header_from:%s, header_to:%s, saved to %s",
+                "email handling fail with error:%s "
+                "mail_from:%s, rcpt_tos:%s, header_from:%s, header_to:%s, saved to %s",
                 e,
                 envelope.mail_from,
                 envelope.rcpt_tos,
                 msg[headers.FROM],
                 msg[headers.TO],
-                save_email_for_debugging(msg),  # todo: remove
+                save_email_for_debugging(
+                    msg, file_name_prefix=e.__class__.__name__
+                ),  # todo: remove
             )
             return status.E404