10.18.6 Spam Back Ends

The spam package offers a variety of back ends for detecting spam. Each back end defines a set of methods for detecting spam (see Filtering Incoming Mail, see Detecting Spam in Groups), and a pair of spam and ham processors (see Spam and Ham Processors).

• Blacklists and Whitelists
• BBDB Whitelists
• Gmane Spam Reporting
• Anti-spam Hashcash Payments
• Blackholes
• Regular Expressions Header Matching
• Bogofilter
• SpamAssassin back end
• ifile spam filtering
• Spam Statistics Filtering
• Using SpamOracle with Gnus