Re: unwise filtering policy from cox.net

["Paul Ferguson" <fergdawg () netzero net>]

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- -- Sean Donelan <sean () donelan com> wrote:

> On Tue, 20 Nov 2007, goemon () anime net wrote:
> > <abuse () cox net>
> >    (reason: 552 5.2.0 F77u1Y00B2ccxfT0000000 Message Refused.  A URL in 
> > the content of your message was found on...uribl.com.  For resolution do
> >  not contact Cox Communications, contact the block list administrators.)
>
> An unfortunate limitation of the SMTP protocol is it initially only
> looks at the right-hand side of an address when connecting to a
> server to send e-mail, and not the left-hand side.  This means
> abuse () example com first passes through the same server as all of
> the rest of *@example.com e-mail.  A single high-volume or special
> address can easily overwhelm the normal email infrastructure (i.e. mailbox
> full) or the normal server administrators may make changes which affects 
> all addresses passing through that server (i.e. block by IP address).

Sure, it's an "unfortunate limitation", but I hardly think it's
an issue to hand-wave about and say "oh, well".

Suggestions?

- - ferg

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--
"Fergie", a.k.a. Paul Ferguson
 Engineering Architecture for the Internet
 fergdawg(at)netzero.net
 ferg's tech blog: http://fergdawg.blogspot.com/