Systems and methods for supporting group communications are provided. A
group list management server (GLMS) stores communications group
definitions in documents, such as extensible mark-up language (XML)
documents. The communications group can include communication addresses
for different types of communication applications, including electronic
mail, voice telephone, data, instant messaging, voice dispatch, short
messaging service (SMS), and multimedia service (MMS). Various methods
for managing communications groups and features provided for
communications groups are provided.