Cyrus frequently uses SASL (saslauthd) to authenticate pop3/imap connections. The problem we had with it was that after you started getting upwards of 10,000 connections a day, the memory usage by the 4 default processes it starts was getting WAY out of hand. The machine would start swapping (causing BIND to die) even though it had 2GB of RAM in it after a few hours. We initially started with writing something to restart saslauthd every 4 hours but even this proved to sometimes not be often enough. Finally we found a solution in the cyrus list. Apparently it's the forking that causes the memory leak.

Put this line in your /etc/rc.conf to fix the problem:

	sasl_saslauthd_flags="-a pam -n0"
	

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