1. A method of transmitting multimedia messages, said method comprising: sending a multimedia message from a terminal of a sender to a server of a multimedia messaging system; storing the multimedia message in the server; transmitting, from the server to a terminal of a receiver, over a first wireless interface disposed in said server, a notification of the multimedia message; automatically retrieving in response to said notification the multimedia message from the server by the terminal of the receiver over a second wireless interface disposed in said server and distinct from said first wireless interface without user intervention; and charging the sender at least partly for the retrieval of the multimedia message from the server by the terminal of the receiver wherein the notification contains at least the contact information of the second wireless interface, the notification comprises at least one of a message-specific identification or a message-specific address related to the message, and the terminal of the receiver retrieves the multimedia message from the server using said notification, a part of which identification/address can be a password or the identification can be merely composed of a password.