You don't have strange memory problem with courier-authlib? I have ~1000 users and 2x3GHz Intel Xeon with 2GB RAM. I must restart authlib weekly, otherwise run out of full memory.
I have other smaller toaster servers on debian or gentoo linux, and with all of them there is problem. With older courier-imap-3.0.x works all fine. -- Zsolt Erki-Kiss
