[100900] in North American Network Operators' Group
Re: unwise filtering policy from cox.net
daemon@ATHENA.MIT.EDU (Paul Ferguson)
Wed Nov 21 01:55:02 2007
From: "Paul Ferguson" <fergdawg@netzero.net>
Date: Wed, 21 Nov 2007 06:51:42 GMT
To: sean@donelan.com
Cc: nanog@merit.edu
Errors-To: owner-nanog@merit.edu
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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 administrator=
s.)
>
>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. mail=
box
> full) or the normal server administrators may make changes which affec=
ts =
>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/
