'Message too big' for incoming messages

May 12, 2023
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We are receiving the below error when we are sent some emails with attachments that should be received fine.

Diagnostic-Code: smtp; 552 5.3.4 Message too big

Any idea why this would happen and what to check in PMG to fix this?

Thanks,
Aaron
 
Diagnostic-Code: smtp; 552 5.3.4 Message too big
Where exactly to you get this message - from which system?

Please post the logs from PMG for this e-mail

else - on a hunch - make sure you have a large enough size configured for PMG (GUI->Configuration->Mail Proxy->Options)

I hope this helps!
 
Where exactly to you get this message - from which system?

Please post the logs from PMG for this e-mail

else - on a hunch - make sure you have a large enough size configured for PMG (GUI->Configuration->Mail Proxy->Options)

I hope this helps!
When this maxsize is exceeded, where can i find this in the log? We came this across in our organization, but i was unable to reproduce this from the log. The only evidence is the message that the user receive. Is there a way to find this back in the log?
Is the log: smtpd disconnect line the one that define this? ehlo=1 quit=1 commands=2
thanks in advance
 

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