RE: AOL 421 errors

["David Hubbard" <dhubbard () dino hostasaurus com>]

From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On 
> We've noticed a surge in 421 e-mail errors from AOL.
>
> Message soft bounced for '###@aol.com', '4.3.2 - Not 
> accepting messages at 
> this time ('421', [': (DYN:T1) 
> http://postmaster.info.aol.com/errors/421dynt1.html', 'SERVICE NOT 
> AVAILABLE']) []'
>
> It seems as though they've tightened down their policies.
> We're pretty good at preventing spam with our IronPort
> anti-spam gateways and internal policies.
>
> We've also subscribed to their FBL notification service.
> I'm surprised at the types of messages AOL customers consider
> as spam. Anything and everything: university admission acceptance
> notices; instructor class assignments; photos from friends; etc.

AOL users report receipts for things they have bought or
letters from their kids as spam, or just use the spam button
instead of delete.  We have a feedback loop with them on a
netblock we moved off of about 24 months ago; I've emailed
their postmaster at least 12 times with no response and no
change.  I've called and they refuse to talk and say I must
email or use the form on the postmaster site to be removed;
no effect.

David