The present invention is directed to a system and method for identifying the most likely recipients for a message or other communication from a source and building a most frequently used list of recipients. The present invention utilizes a contact list and determines the likelihood that a list of recipients from that contact list are the intended targets for a current message. The likelihood determination is made using both how recent and how frequent prior communications were made to particular individuals or groups of recipients. Further, a user is able to switch between a most frequently used list of recipients and full list of contacts.