I was curious if anyone has implemented a mechanism in sendmail to determine if a user is over their Cyrus quota before attempting LMTP delivery of the message. If so, how was it impemented?
In our environment, I would have to say that easily, 3/4ths of all our e-mail
hitting the LMTP server is over-quota'd e-mail.
What I have done is to create a new hash file called /etc/mail/overquota.db that gets updated periodically (once an hour or maybe even less) with the list of users currently over their quota's. I then modified the sendmail queuegroup rules to check for the existence of a user in that hash file and move then to the overquota queue if so.
I find this better than dumping all e-mail destined for local delivery to the cyrus queue, and then using a queue mover to find all the messages that had attempted LMTP delivery, but failed with an "Over quota" message. That turns out to be very expensive with regards to disk I/O and CPU utilization.
Also, if anyone else has other interesting ideas on how they handle lots of over quota e-mail (besides shortening the time that e-mail is kept on the server or rejecting that e-mail outright), I would be interested in hearing about it.
Scott
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Scott W. Adkins http://www.cns.ohiou.edu/~sadkins/
UNIX Systems Engineer mailto:[EMAIL PROTECTED]
ICQ 7626282 Work (740)593-9478 Fax (740)593-1944
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