The invention provides a system and method for associating related messages of different types. The system has a message server in communication with a client device over a network. The message server receives a message from the client device. The server determines whether a former session identification (ID) was transmitted with the message. If the former session ID was not transmitted with the message, the server associates a current session ID with the message. Finally, the server stores the message, whereby a user may retrieve the message using one of the former session ID or the current session ID.