What would others recommend these days as an anti-spam tool, suitable for integrating into a Postfix/Dovecot configuration? My experience: Spamassassin - when last I used it, accuracy wasn't adequate (at least for classifying my mail) and it tended to be memory-intensive if Bayesian filtering was enabled. Dspam - very good, but I haven't used it for over a decade and it was recently removed from Debian (which wouldn't prevent me from installing it). It doesn't seem to be under ongoing development. CRM114 - not under significant development currently, but it's my solution at the moment and it's giving good accuracy. I haven't tried any others. Nor have I used Dspam or SpamAssassin for a long time now. Up-to-date suggestions are welcome. I have friends who are also considering this issue and thinking about Dovecot Antispam.