Hi Daniel-
I have seen all kinds of shenanigans played with error messages, so I am
working under the assumption that the error message is misleading. Here's
why: ATT advertises two IPs, both of which behave identically, from what I
can see. It is hard to believe an organization with the resources of ATT
would have two grossly overloaded gateway servers handling all their mail.
Assuming they are different servers, which they appear to be, a policy of
some kind is probably at work there. Whether it is flow control, gray
listing, bandwidth discrimination*, or whatever, is hard to tell. That is
clearly nothing we can do anything about except yell loud and long.
In case it is nothing nefarious on the part of ATT, then my best guess is
still DNS problems of some description. And that we can usually fix.
-d
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*/ Bandwidth discrimination based on an economic relationship - more than
occasionally referred to in polite comapany as extortion - is a very good
suggestion on your part. This issue does loom large on the horizon. The
president or CEO of SBC/ATT was quoted recently, referring to Yahoo as I
recall, as saying nobody's gonna ride "his" pipes for free. But at least for
now, I am not paying extra and I get mail to ATT without trouble.
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