A method and system of mass multimedia messaging in a system having a service provider and a plurality of subscriber communication terminals supported by the service provider, wherein at least some of the subscriber terminals have different messaging capabilities and different message format requirements. The method includes adaptation and handling of a mass multimedia message, and mass multimedia message notification. The system uses a retrieval platform and a processing platform. The retrieval platform generates a unique message identifier for the mass multimedia message, and pre-adapts the message into adapted content messages for the terminal types supported by the service provider. The processing platform formats message notifications for the subscriber terminals based on each terminal's messaging capabilities, with each notification containing the unique message identifier.