On 03/16/2013 02:43 AM, Lorenzo Pistone wrote:
> Ok, the smtpaccess entry works, but I thought it didn't because being
> the number of received emails in the order of tens of thousands, lot of
> them were still in the queue and kept being delivered.

It's uncommon for simple spam to appear at such a high volume.  On the 
other hand, I do see extremely high volumes of spam on servers where one 
or more user passwords have been compromised.  Check the headers of some 
of those message and see if they indicate that AUTH was used to send the 
message.

If you find that a user's password has been compromised, naturally you 
should have them do a full virus scan (or wipe), and a password change 
at least.

Pythonfilter includes a script named "dropmsg" that you can use to clean 
out your queue.
  dropmsg -i IP.ADDR.XX.XX
...will move all of the messages from the given IP address to a 
quarantine directory.  No bounce notifications will be generated.

http://phantom.dragonsdawn.net/~gordon/courier-pythonfilter/

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