Sa-learn-cyrus is a perl script using sa-learn from the SpamAssassin package to train it knowing spam and ham. sa-learn-cyrus gets its spam and ham messages from Cyrus-imapd mailboxes instead of mbox files or Maildirs as sa-learn does. This is useful for Cyrus users who for example sort their missed spam into a subfolder and let sa-learn-cyrus read it out (e.g. using a cron job).

SpamAssassin is spam filter with numerous features including automatic white-listing, RBL testing, Bayesian analysis, header and body text analysis.

Cyrus is a fully-featured IMAP daemon.