[122689] in North American Network Operators' Group
Re: Spamhaus...
daemon@ATHENA.MIT.EDU (Rich Kulawiec)
Fri Feb 19 15:31:05 2010
Date: Fri, 19 Feb 2010 15:30:30 -0500
From: Rich Kulawiec <rsk@gsp.org>
To: nanog@nanog.org
In-Reply-To: <87wry99ji9.fsf@nemi.mork.no>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Feb 19, 2010 at 07:18:38PM +0100, Bj??rn Mork wrote:
> I don't know what Rich referred to, but Barracudas used to be easy to
> spot by backscatter levels:
> http://www.dontbouncespam.org/#barracuda
They're *still* easy to spot by backscatter levels, probably because
(a) a lot of people still have that switch set to "on" (b) some people
still switch it to "on" (c) Barracuda's engineers apparently think
that using SPF stops backscatter -- and it most emphatically does not.
Reject gooooood, bounce baaaaaaad. [1]
Now whether there are *other* ways to spot them: I don't know. But
there are some very sharp people at Spamhaus, and it would not surprise
me if they knew.
---Rsk
[1] Unless you are bouncing to an authenticated/internal user.
