Message Size Violation error found in SMTP Prevent log
Article ID: 159768
Updated On: 06-11-2025
Products
Data Loss Prevention Enforce
Issue/Introduction
The following error is found in the SmtpPrevent_operational0.log
02/Feb/12:01:45:24:486-0500 [INFO] (SMTP_MESSAGE.5300) Error while processing message (tid=2a cid=2,617 message_id=<###@LocalDomain> dlp_id=### size=11,364,346 sender=<sample@sample.com> recipient_count=1 disposition=PASS code=550 estatus=<> text=<5.7.0 Message Size Violation> rtime=2.59s dtime=2.64s mtime=<> reason=<Message not accepted by forwarder>)
An Email with a large file attachment doesn't make it through to the receiver.
Resolution
This error message is received when there is a restriction or policy applied for size limitation of the email on the downstream MTA.
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