> I am now thinking of just banning all AOL users. Has anyone else run
> into analogous problems with AOL? If so, are there any other remedies
> other than a site ban?
AOL actually has a very well run mail system. Their bounce reports are
quite accurate and readable. I'm with Chuq, the problem is that some
other address is forwarded to the bum AOL address.
The only way to diagnose these things is with list probes, messages sent to
each subscriber with a code in the subject and body that identifies who you
sent it to, so when a smashed NDR comes back you can figure out which message
and hence which address it was.
John Levine, email@example.com, Primary Perpetrator of "The Internet for Dummies",
Information Superhighwayman wanna-be, http://iecc.com/johnl, Sewer Commissioner
Finger for PGP key, f'print = 3A 5B D0 3F D9 A0 6A A4 2D AC 1E 9E A6 36 A3 47