Zane C. B. wrote:
Qmail and the Spamcontrol patch set is nice. qmail.org
Qmail's architecture is pretty good, but it's not suitable for the real world without those patches. I usually suggest that people just use Courier. It's very familiar if you've used Qmail, but it's actively developed and supports a wealth of features, without having to wade through a bunch of patches.
http://www.courier-mta.org/
