Has anyone else had problems sending SMS messages to t-mobile customers? I assume that you only need to put the phone number as the destination in the short mail web site or Treo600SMS as opposed to the @tmomail.net suffix, but I haven't had any success with that. It seems to work, but the message never gets delivered.

If I use the @tmomail.net suffix, it will work sending, but the Treo600SMS app doesn't appear to remember that you need to send it that way and when you reply in the tool it comes out to only his phone number which, as I said before, doesn't get delivered.

Anyone got any insight in this?