Hi, I was happily using vpopmail 5.2.1 and qmailadmin. Everything was fine.
However, our clients demanded some form of webmail access, so after trying a few packages, I settled for SquirrelMail (PHP pages that we could set to our needs). SquirrelMail requires an IMAP server for authentication and Courier-IMAP seems to be the fastest around and recommended by most groups. Everything worked wonderfully EXCEPT for the fact that you could only authenticate about 3 times before getting a username/password unknown error. If I restart the Courier authentication daemon it works for another 3 times. I even tried setting up a cron job to run a script as root that restarts the Courier authentication daemon every minute. The Courier IMAP list was the first place I searched for help but they were adamant that the problem is with vchkpw and that I should upgrade to version 5.3.20. I have done this but still have the same problem. Any suggestions? Has anyone else had this problem?