[77564] in North American Network Operators' Group
Re: marking dynamic ranges, was fixing insecure email infrastructure
daemon@ATHENA.MIT.EDU (J.D. Falk)
Tue Jan 25 12:43:35 2005
Date: Tue, 25 Jan 2005 09:43:06 -0800
From: "J.D. Falk" <jdfalk@cybernothing.org>
To: nanog@nanog.org
In-Reply-To: <20050125170302.GV62086@Space.Net>
Errors-To: owner-nanog-outgoing@merit.edu
On 01/25/05, Markus Stumpf <maex-lists-nanog@Space.Net> wrote:
> I am generalizing on what I see from about 300 mailservers and about
> 1 million messages a day.
One million ain't much by today's standards. That gets lost in
the noise at any of the bigger providers. I'd question whether
that gives you a sufficiently wide sample.
(I'm also surprised you need 300 servers to handle such a small
load -- what is that, ~3333 messages per server per day?)
> As you can see, we don't filter out "no revDNS", too. But setting
> MTAMARK records would give the admins of the receiving mailservers
> a hint as how to classify the sending IP.
Sure! It's a great idea...but if you could get every site in
the world to cooperate on ANY great idea, we'd be way ahead.
--
J.D. Falk uncertainty is only a virtue
<jdfalk@cybernothing.org> when you don't know the answer yet
