Todd A. Jacobs wrote:
> On Mon, Oct 30, 2006 at 03:35:11PM +0100, Zeno Davatz wrote:
> 
>> because TMDA sends out replys to dead end Spam-Traps of Spamcop.
> 
> If you know the domains of the spam traps, you can set your policy to
> drop those messages silently. 

They are secret.  There is no test you can apply to determine if an 
email is a spam trap.  There is no guarantee that trap emails have SPF 
or DK records published for their domains.  This is by design.

SpamCop disapproves of TMDA so they have no real desire to help us.  I 
dealt with this recently when my hosting company was blacklisted by them.

 > I think the issue is that you're dealing
> with joe-jobs, which is *not* the job of TMDA to handle.
> 
> You might want to include SPF or RBL detection at the MTA, as well as
> other common-sense steps like rejecting mail from MTAs without a valid
> HELO or resolvable hostname.
> 
> FWIW, SPF and domainkeys were designed specifically to prevent joe-jobs,
> but neither is widely adopted. YMMV.

These help, but since spam traps are run by a distributed group of 
sysadmins (i.e. SpamCop doesn't have direct control over these domains), 
there are no guarantees that this will help you.

SpamCop has an anti-C/R policy, and my correspondences with them 
indicate that they are not interested in changing it.

My experiences and some other details are here:

http://dave.redterror.net/2006/10/02/spamcop-blacklists-and-policy/

PS - FWIW - SpamCop's official line is that using their blacklist as a 
RBL is wrong... but a ton of people do it.

Regards,
-- 
Dave Steinberg
http://www.geekisp.com/
http://www.steinbergcomputing.com/
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