Patent ID: 7627641

Claim:
A computer-implemented method of recognizing an incoming email message as being desired, the method comprising: in at least one email server, arranging contents of an outgoing email message into at least one outgoing email message fragment; in said at least one email server, for each outgoing email message fragment, creating an outgoing email message representation comprising at least a portion of contents of the outgoing email message fragment; storing, in said at least one email server, each created outgoing email message representation; in said at least one email server, arranging contents of an incoming email message into at least one incoming email message fragment; in said at least one email server, for at least one incoming email message fragment, creating an incoming email message representation comprising at least a portion of contents of the incoming email message fragment; in said at least one email server, comparing each incoming email message representation to each outgoing email message representation to identify matches therebetween; and in said at least one email server, identifying the incoming email message as being desired if the matches identified meet a pre-defined threshold test.