I just heard about policyd-weight so I did an
apt-cache search policyd which returns three options:
Which one is the best, and do you have any tips on setting them up?
Our current setup is whitelister plus postgrey to greylist RBLd hosts, then fail2ban them for 10 minutes if they have 10 failures, followed by content filtering (Kaspersky Anti-Spam). The content filtering is pretty good, but there's still a lot of spam that gets through the RBL greylisting.