Considering:

• that most wireless data networks shall converge toward being IP based;

• that Open Mobile Messaging is the main proven application in most wide-area wireless networks;

• that the Open Mobile Messaging industry and Internet Email industry can and should converge based on a set of open protocols that address the efficiency requirements adequately;

• that existing Internet email protocols are not bandwidth efficient;

• that existing Internet email protocols do not properly support the “push” model of delivery of urgent messages,

• the EMSD protocol is designed to facilitate the convergence of IP based Open Mobile Messaging and Internet email.