My email wouldn't send and I hadn't changed a thing or so I thought. I called a tech and we went through the whole setup several times. Still the email would not send. So I thanked him and said I will try rebooting the modem. As an after thought he said to also boot the uverse box. Click! I changed services about the same time the email stopped working. repowered the uverse box and the modem and wala I have email again.
Who'd a thunk that.
BTW, I was in a panic to get it fixed too. I had an interview and wanted to send a thank you letter. Whew! that was close. Although I could have sent it via webmail.