Spam Assassin is an automated mail filter that uses a wide range of heuristic algorithms on mail headers and message body text to identify “SPAM” (unsolicited email). This software is capable of eliminating more than 98% of all SPAM messages. Its performance depends on the individual configuration, which can be tuned by each website owner. Once identified, the mail is tagged as “SPAM” for later filtering using the user’s desktop mail client.
All shared and semi-dedicated plans also include another very powerful spam fighting tool called Spam Experts. It filters incoming messages by applying complex algorithms for determining what might be spam and what not. The tool allows various whitelist and blacklist rules to be set.