Hi, I believe there was some discussion about this some time ago, but recent events have made me think of this again...
The "standard" chkuser patch that vpopmail uses (see Bill Shupp's update to the original: http://www.shupp.org/patches/chkuser-0.6.mysql.patch) has some rather nasty behaviours. If for some reason your mysql server is unavailable (load has shot so high that mysql can't return a prompt reply, you're upgrading mysql, taking db down for maintenance, etc.) the chkusr patch will start telling remote smtp clients that the user doesn't exist. This is not good; you never want to send a 550 on a user that really does exist; people get upset when things bounce, and mailing lists start looking at auto-removal. Has anyone found a better solution that integrates well with vpopmail? The goodrcptto patch is interesting, but too much work to maintain. I'm also wondering if there are any plans for the vpopmail stuff to support talking to multiple databases; ie: if no answer or timeout on one, hit a slave that's replicating off the master. Thanks, Charles
