[65588] in North American Network Operators' Group
Re: AOL rejecting mail from IP's w/o reverse DNS ?
daemon@ATHENA.MIT.EDU (Suresh Ramasubramanian)
Wed Dec 3 10:26:30 2003
Date: Wed, 03 Dec 2003 10:25:57 -0500
From: Suresh Ramasubramanian <suresh@outblaze.com>
To: "Christopher X. Candreva" <chris@westnet.com>
Cc: nanog@nanog.org
In-Reply-To: <Pine.GSO.4.58.0312031009400.15944@westnet>
Errors-To: owner-nanog-outgoing@merit.edu
Christopher X. Candreva writes on 12/3/2003 10:13 AM:
> Since I'm 99% sure the idea (or stupidity thereof :-) of blocking SMTP
> servers without reverse DNS came up here in this discussion, I just ran a
> manual queue run to clean out a queue, and saw this come up:
They have had this policy since several months now but it is still a
"may" - and does give them a good excuse to take out large IP blocks
that don't have proper reverse DNS assigned and emit a lot of spam.
More at http://postmaster.info.aol.com
If this is what it takes to push more people to get valid PTR records on
their mailservers ...
> I don't know if this is new -- I don't recall seeing it before, but it
> doesn't say they WILL refuse, just they may. If they do start blocking --
> this WILL be an operational issue.
Lots of mailservers (such as the one for freebsd.org) already do this.
I have not seen any large ISP other than AOL do this yet, though.
However if they make it a "must" rather than a "may", I can see a whole
lot of ISPs who will be quite eager to follow suit and do something on
the same lines.
srs
--
srs (postmaster|suresh)@outblaze.com // gpg : EDEDEFB9
manager, outblaze.com security and antispam operations
