Watchguard Technologies, Inc.

Christopher John Gabe

Robert Osborne

John Alsop

John Aslop

Robert Anthony Osborne

A system and method for providing a reputation service for use in messaging environments employs a reputation of compiled statistics, representing whether SPAM messages have previously been received from respective a selected set of identifiers for the origin of the message, in a decision making process for newly received messages. In a preferred embodiment, the set of identifiers includes the IP address, a tuple of the domain and IP address and a tuple of the user and IP address and the set of identifiers allows for a relatively fine grained set of reputation metrics to be compiled and used when making a determination of a likelihood as to whether a received message is undesired in accordance with the invention.

Reputation-based method and system for determining a likelihood that a message is undesired

A system and method for recognizing an incoming email as a desired email examines outgoing email messages to arrange the email into fragments for which representations are created and stored. When an incoming message is received, the message is arranged into fragments for which representations are created. The representations of the incoming message are compared to the stored representations and if the matches between stored representations and the representations of the incoming message meet a predefined threshold test, the incoming message is recognized as being desirable. An incoming email message which has been recognized as being desirable can be subjected to a lesser examination to recognize a SPAM message, or to no further examination to recognize a SPAM message.

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Mississauga, Canada

Christopher John Gabe