Blacklist spam with this utility. SpamCatcher tracks email on its own server, taking note of which bulk messages users are rejecting. Then, for each email you receive, it determines which email is likely to be spam and sends users a probability score on how likely it is to be spam. You can also use the software to create your own rules to identify and blacklist spam. Every time you fetch new email, SpamCatcher automatically checks for new rules and updates itself. Hundreds of rules are applied to compute a spam probability score and catch new spam.