sa-blacklist is a hand-checked list of over 10,000 spammer
domains. It's formatted for Exim, Postfix, Privoxy, Qmail,
Spamassassin, Squid, and Sendmail. Depending on the
application, it can block or score either on the sender domain
and/or the embedded URLs in the spam. It's also available as
an RBL (a DNS-based lookup of spammer domains).
