Ben Kennedy schrieb:
> Hey all,
> 
> For the past day or so, one of my users has been trying to relay a 250
> megabyte message.  I started noticing a 400 kbps spike on my MRTG graph
> that started yesterday evening, and after doing some capturing with
> snort, realised that it was due to repeated inbound sessions on port 587
> from the same IP address.
> 
> Sure enough, in the maillog there is a "523 Message length exceeds
> administrative limit" message every hour or so.  Apparently, the client
> will connect, spew hundreds of megabytes of data until it thinks it's
> done, gets the 523 message, and blindly try again.  Repeat ad infinitum.
> 
> I have just gotten through to the responsible party on the phone;
> apparently they now recognize this as the problem, but for whatever
> reason can't figure out how to delete it from their outbound queue in
> Outlook.  *rolls eyes*

> Any comments or suggestions, anyone?

This is typical for this Outlook crap - it doesn't obey a 5xx message
and sends the message over and over again - same problem happens with
Postfix instead of Courier as the SMTP server :(

Fix the client - not the server...

Cheers,
Juri


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