SpamAssassin is a mature, widely-deployed open source project that serves as a mail filter to identify Spam. SpamAssassin uses a variety of mechanisms including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. SpamAssassin runs on a server, and filters spam before it reaches your mailbox.
Upgrading spamassassain to version 3.3.2
The release of version 3.3.2 was announced today (http://svn.apache.org/repos/asf/spamassassin/branches/3.3/Changes). Here is how to update quickly:
perl -MCPAN -e shell
cpan> o conf prerequisites_policy ask
cpan> force install Mail::SpamAssassin Mail::SpamAssassin::Plugin::Razor2