A small, fast, flexible Bayesian filter for processing e-mail. It is "trained" by the user to categorize email as spam or non-spam. This implementation integrates well with existing tools such as procmail and mutt. It can use a variety of formats for storing data. A utility is supplied for converting data between the supported formats.

This package includes support for text and libdb formats.

See "A Plan for Spam" by Paul Graham for further information.