[67299] in North American Network Operators' Group
Re: question on ptr rr
daemon@ATHENA.MIT.EDU (Randy Bush)
Sat Feb 7 11:08:45 2004
From: Randy Bush <randy@psg.com>
To: Suresh Ramasubramanian <suresh@outblaze.com>
Cc: nanog@merit.edu
Date: Sat, 7 Feb 2004 11:08:09 -0500 (EST)
Errors-To: owner-nanog-outgoing@merit.edu
> There are quite a few sites (including the freebsd.org mailserver, and,
> on a case by case basis, even AOL) that do refuse mail from IPs without
> rDNS, but turning on a "must have rDNS or you can't email us" setting
> will definitely result in a non trivial amount of false positives.
but, i suspect that more and more of the world will go that
way, maybe slowly. so how does one judge when a site which
hosts public lists can do so without causing serious
discomfort for folk? is there some objective measure, or do
we all just shoot in the dark?
randy
