A method and system for authorizing communications sent from a sender to a recipient. The authorization system receives a communication sent from a sender to a recipient. The authorization system determines whether that sender is authorized to send communications to that recipient. If the authorization...http://www.google.es/patents/US7039949?utm_source=gb-gplus-sharePatente US7039949 - Method and system for blocking unwanted communications
Method and system for blocking unwanted communications
