Comments inline:
Then apparently there is
an AT&T bug that keeps sending you emails despite the fact that you
are correctly set with SSL.
Post the complete error message, and I can probably figure out why that
happens. As a minimum, I would need the exact name of the AT&T
server you are using for SMTP.
I'm trying to access the COX server from the AT&T network. Cox has
port 25 blocking, but I can't find an opt-out on their site. I'll
have to give them a call (and not tell them I'm using TB as they'll
just jump ship on me immediately).
It's not Cox port 25 blocking that will block you from sending from
the AT&T network. AT&T port 25 blocking would be the culprit.
Gary VanderMolen, MS-MVP (Mail)
