Since we added qgreylist our servers have experienced a much 'cleaner' mail environment, like everyone else here can attest to.. which our clients love
the only issue i have most recently found is that every now and then our load averages go through the roof - 20+ - which tends to bring other services to a grinding halt...
monitoring top i've noticed that greylist (via perl) is often the culprit.. followed by spamd..
anyone have any tips on how to tame these utilities resource consumption so we can avoid this sort of problem?