A method for filtering spam is disclosed comprising the steps of: assigning weights to a plurality of recipient e-mail addresses; determining a set of similar e-mails from a plurality of e-mails sent to the recipient addresses; calculating a score based for each set of similar e-mails; placing the score...http://www.google.com/patents/US7761567?utm_source=gb-gplus-sharePatent US7761567 - Method and apparatus for scoring unsolicited e-mail
