Thanks for the reply Francis! Here on OpenBSD, spamd takes care of the greylisting so I'm all set there.
After much going back and forth regarding amavisd-new+spamassassin, I came to the conclusion that it was an overly complex solution, written in a dying language, that during the course of time loses its effectiveness: http://cowboyrushforth.com/2008-10-31/dspam_experiement As for clamav, seems it only manages to stop ancient viruses (which are rarely in circulation these days), and doesn't stand a chance against all these new trojans created by many of the world's most brilliant minds. Mikkel 2012/8/21 francis picabia <fpica...@gmail.com> > I use postfix with postscreen, spamhaus and other RBLs, nolist greylisting, > sqlgrey greylisting, amavisd-new (which calls in spamassassin), and clamav. > > Freshclam and sa-update are run daily by cron. > > Here are my stats today on the primary MX (actually secondary due to > nolist) > > Aug 21 > Connect: 13840 > Delivered: 12190 > Reject total: 10986 > Reject blocklists: 7710 > Reject Reverse DNS: 222 > Reject address or overquota: 1396 > Early Hangup: 2466 > Pregreeted: 777 > Greylisted: 1543 > Tagged: 936 > Quarantined: 608 > Infected: 3 > > The numbers might be strange when looking at connect versus > the other totals, but remember one connection can send > multiple emails. > > Tagged is the spam tag count, while severely high spam scores > are quarantined with virtually no false positives). > > Without nolist greylisting, the connect stat would be about > 600,000 to 800,000 per day. > > Early hangup and pregreeted are both features > from postscreen. Where postscreen and greylisting really help > is on the secondary MX. Here are today's stats on the > lower priority MX. > > Aug 21 > Connect: 773 > Delivered: 53 > Reject total: 4057 > Reject Blocklists: 3327 > Reject Reverse DNS: 110 > Reject address or overquota: 33 > Early Hangup: 1351 > Pregreeted: 420 > Greylisted: 545 > Tagged: 75 > Quarantined: 75 > Infected: 0 > > Look at that. Only 53 delivered half way through the day. > Before postscreen and greylisting, it was delivering about > 5000 to 9000 emails per day. They were all spam because > after the change, there are no calls asking where a missing > email is. > > I also track these stats in cacti with the total for each day. >
