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It works on the server side, taking input from the maildirs that provide the back-end for the IMAP server. It reads mail in designated maildir folders (spam on the one hand, ham on the other) and feeds them to spamassassin for bayesian learning and submission to various spam detection schemes while reducing training-related admin workload to nearly zero. Fits any setup storing mail as maildir, but could trivially be modified to work with mbox based systems. It depends on archivemail and formail, both packages being available from Debian.

A simplified version of the above script that only deals with adding spam (not ham) to the internal "BAYES rules" (and not to external databases) is available at: http://www.new-life.org.au/~tin/teach-sa_lite.sh This version may be more suitable when users don't understand email and spam very well, and things need to be made more simple.

Setup of special aliases in Postfix to forward spams and hams

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