[Greylist-users] Side benefit

Evan Harris eharris at puremagic.com
Wed Aug 20 13:59:16 PDT 2003

I've noticed a dropoff in spam attempts as well, probably due to that
reason.  In fact, if you look at the traffic patterns of the spam attempts,
there is a particular type of spambot that does dictionary attacks.  I think
spam gangs use those special machines to pull the addresses that they
verify as working into their spam lists.

But since greylisting blocks all of those attempts (they happen only once
per random recipient), I'm betting that even when they do happen to hit a
valid email address, they still see the error and consider it an invalid
user, and cleanse it from their lists.


On Wed, 20 Aug 2003, Alan Batie wrote:

> When I first started running greylisting, mysql reported 7-8 queries/sec.
> I rebooted after updating the kernel this weekend, and noticed that it's
> now reporting about 4 queries/sec --- I have a suspicion that the errors
> are causing the addresses to get scrubbed from the spammer lists...
> --
> Alan Batie                   ______    alan.batie.org                Me
> alan at batie.org            \    /    www.qrd.org         The Triangle
> PGPFP DE 3C 29 17 C0 49 7A    \  /     www.pgpi.com   The Weird Numbers
> 27 40 A5 3C 37 4A DA 52 B9     \/      spamassassin.taint.org  NO SPAM!
> To announce that there must be no criticism of the President, or that we
> are to stand by the President, right or wrong, is not only unpatriotic
> and servile, but is morally treasonable to the American public.
> -Theodore Roosevelt, 26th US President (1858-1919)

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