This milter does not itself filter spam, instead it memorizes the
verdicts issued by your other anti-spam defenses to reduce the system
load and resource consumption, by temporarily rejecting the relays
suspected of spamming (banned) and, optionally, by permanently rejecting
the relays "convicted" of spamming (blacklisted).
The idea is to stem the spam from real spam sources, while reducing the
ill effects of false-positives to merely delaying, rather than rejecting
future messages.
WWW: http://virtual-estates.net/skem/
