SMTP Prevent fails to process a message and responds with " 554:Smtp_Message.5300 Error while processing message "
The File reader log shows the following entries
5300 Error while processing message (cid=1 message_id=<> dlp_id=11b9a6f4b02 size=0 sender=<tmw> recipient_count=1 disposition=ERROR code=554 estatus=5.5.7 rtime=<> dtime=<> mtime=20.45s reason=554 5.5.7 Fatal: Malformed message content.)
5301 Sender rejected during re-submit
5302 Recipient rejected during re-submit
The message has to create fully RFC 2821 (RFC 821) compliant communication with the MTA.
The seen error message is typical when a non-RFC compliant message is encountered. Please review the communication between the MTA and SMTP Prevent.