no. i just spent 5min trying to explain it here but i couldnt get it to make since but i found this
"This is a special gateway number generated by the AT&T MEdia email-to-SMS gateway. When email is addressed to
NUMBER@CingularME.com or
MEdia_ID@CingularME.com, the incoming gateway forwards to that NUMBER (or the NUMBER for that MEdia_ID) as SMS message(s), and that special gateway number is used to track the email address of the sender. Reply to the sender is easy, because the phone will automatically reply to that special gateway number, which will cause the outgoing AT&T gateway to forward to the email address of the original sender. This is thus the preferred method of AT&T email-to-SMS messaging."