Diminishing false positive classifications of unsolicited electronic-mail

A system for diminishing false positive classifications of unsolicited electronic-mail, the system comprising:

• a database of signatures, each of the signatures associated with unsolicited electronic-mail to be excluded from an end-user mail client;
• an electronic-mail server coupled to a network appliance, the network appliance configured to intercept unsolicited electronic-mail as identified by a signature from the database of signatures prior to receipt of the electronic-mail by the mail server;
• and
• an end-user mail client coupled to the electronic-mail server, the electronic-mail server configured to receive electronic-mail not identified as unsolicited electronic-mail by one or more of the signatures from the database of signatures.

A computer-readable medium having embodied thereon at least one program, the at least one program being executable by a computer to perform a method for diminishing false positive message classification of unsolicited electronic-mail, the method comprising:

• applying a set of message classifiers to an electronic-mail message, the set of message classifiers comprising:
• at least one rule-based heuristic,
• at least one content filter, and
• user-generated feedback;
• generating one or more signatures indicative of unsolicited electronic-mail based on at least the set of message classifiers applied to the electronic-mail message;
• applying the one or more signatures to subsequent incoming electronic-mail messages, wherein unsolicited electronic-mail may be identified and false positive identifications of normal electronic-mail messages are reduced.