[BlueOnyx:07966] false alarm message size warnings?

[Roy Urick]

Ok, here’s a weird one. 

We have one vendor who is now getting bogus undeliverables when sending
large files to our BO box.  The message leaves the sender's exchange server,
hands it off to our Barracuda, which successfully delivers the message to
the BO mailbox. The recipient also receives the message (and 9mb) attachment
just fine. The only thing wrong is the sender is getting the bogus bounce
below:



---------------
Delivery has failed to these recipients or distribution lists:
 
[user address redacted]
This message exceeds the maximum message size allowed. Microsoft Exchange
will not try to redeliver this message for you. Please make the message
smaller -- by removing attachments, for example -- and try sending it again,
or provide the following diagnostic text to your system administrator.
 
 
 
 
 
 
 
Diagnostic information for administrators:
 
Generating server: [FQDN]
 
[user address redacted]
#< #5.3.4 SMTP; 552 size limit exceeded> #SMTP#
 
Original message headers:

[original headers that show no errors]