[courier-users] IMAP problems

[Ben]

Hey guys,   I'm running Courier-IMAP combined with relay-ctrl 3.0 on a redhat 7.2 box, using PAM authentication and SSL. For the most part, things work great, but occasionally my users have problems. I would blame it on Outlook Express, except that the problems seem to come in waves - suddenly all users get errors that "the server unexpectedly terminated the connection" or "headers could not be downloaded" - and just as suddenly everybody seems to be working again.   Also, occasionally some of my outlook express users have problems with mail that's been marked "read" becoming unread. Again, I would also blame this on Outlook Express, but this combined with the server problems above lead me to question if maybe Courier-IMAP doesn't have enough resources. There is plenty of free memory, disk space, and cpu cycles, but maybe there aren't enough processes being spawned? Is there something I can check?