HTC 8125 / 8100 / MDA (USA) / K-JAM / P4300 (Wizard)

I use to have a skd2 and now im using the mda and want to access my tmail... right now i can only send and recieve via mytmobile when i change my equipment to sdk2... our data team says that it shouldnt be working but it still is so i was wondering if anybody new the server info or anything???