Patent ID: 8433294

Claim:
A system, comprising: a messaging server configured to: receive, from a first mobile device, an instant message comprising a temporary message address that corresponds to a second mobile device that is to receive the instant message, wherein the temporary message address is one of a plurality of temporary addresses associated with a mobile device identification of the second mobile device stored in a memory resource of the messaging server, and is valid for a period of time specified by a user of the second mobile device or the messaging server; determine the mobile device identification of the second mobile device by comparing the temporary message address that corresponds to the second mobile device with one or more temporary message addresses previously stored and associated with the mobile device identification of the second mobile device; queue the instant message for delivery; and send the instant message to the second mobile device associated with the mobile device identification of the second mobile device upon receiving a notification of a change of a property of the second mobile device from the second mobile device.