From: Bernhard Reiter (bernhardintevation.de)
Date: Mon Jan 07 2008 - 10:39:47 CST

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On Monday 07 January 2008 15:49, mouss wrote:
> Bernhard Reiter wrote:
> > There is a method proposed to reduce spam:
> > Simulate a tar pit so that spammers will give up,
> > by stuttering the first n bytes of an SMTP connection.
>
> few comments:
>
> - like some other approaches, this is only effective if a lot of sites
> implement it. otherwise, spammers have a lot fo available resources.

Eggendorfer claims this to be effective even on one site because spammers
will try to detect a tar pit and thus disconnect even when there is no tar
pit. Of course this will lead to a learning curve, again Eggendorfer claims
this to be a prisioners dilemma, which assumes that it will be an ongoing
battle which is not easy to win for the spammers also.

Looking at OpenBSD's spamd and Eggendorfers publication list, I believe
he has compared spamd to his system and they are quite different.
(Otherwise, could someone point me to the option to stutter on all incoming
SMTP connection with spamd?)

It is true that stuttering will need more resources and also affects the
design of SMTP servers. Still it could be a solution for smaller sites,
keeping a network connection for stuttering seems to be less resource
intensive then some of the other spam fighting mechanisms.

Thanks for your opinions,
Bernhard
--
Managing Director - Owner: www.intevation.net (Free Software Company)
Germany Coordinator: fsfeurope.org. Coordinator: www.Kolab-Konsortium.com.
Intevation GmbH, Osnabrück, DE; Amtsgericht Osnabrück, HRB 18998
Geschäftsführer Frank Koormann, Bernhard Reiter, Dr. Jan-Oliver Wagner

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