I don't know AT&T but I'll tell you what I do about gmail which is what
I use. With some luck, it might give you inspiration.
Normally I get gmail mail by POP3 which means it arrives in SeaMonkey
Mail (but it could be Thunderbird or Opera or Outlook Express or etc.)
just the same way as mail from my
skynet.be account. However, from time
to time I use my browser to log into the gmail webmail page and do the
following:
- in the "Spam" folder, mark false positives (legit mail erroneously
detected as spam) as "not spam", which moves them to the Inbox where the
next poll of my Gmail POP server will find them. It also teaches the
Bayesian filters so that similar mail will henceforward run less chance
of being detected as spam.
- in the "Trash" folder (containing mail I already got by POP), mark
false negatives (i.e. mail which should have been detected as spam but
wasn't) as "spam" in order to teach the Bayesian filters, so that next
time, similar messages will have a higher chance of being detected as
spam. This also moves these messages to the "spam" folder.
After some time, doing this repeatedly teaches the Gmail spam filters
what kind of mail I regard as spam and what kind I regard as nonspam.
The result is pretty good but never perfect.
If there's no way you can get list mail to your AT&T account, I suppose
the workaround is to subscribe to the list via some other account such
as the yahoo account with which you posted the message to which I'm
replying now. You should be able to get Yahoo mail without going through
AT&T. Whether you can _send_ Yahoo mail without going through the AT&T
SMTP servers is a different question: for instance my ISP blocks me from
sending anything on any of the various SMTP ports (with or without
SSL/TLS) to any IP address except its own SMTP servers, so I have to
send my "gmail" outgoing mail through the "
relay.skynet.be" SMTP server.
Again, I don't know AT&T, so I don't know how closely it watches your
outgoing connections.
Best regards,
Tony.
--
"What I've done, of course, is total garbage."
-- R. Willard, Pure Math 430a