[HCS-D] New postfix, new spam filtering

Matt Gline gline at fas.harvard.edu
Sat May 21 12:31:07 EDT 2005


Can I ask a stupid question?

So graylisting works as follows:

spammer sends mail to hcs.

hcs says "come back later"

spammer is lazy, doesn't come back.

spammers are defeating graylisting in the following way:

spammer sends mail to hcs

hcs says "come back later"

spammer sends mail to eecs

why doesn't the spammer just send mail back to hcs later?

--Matt

On Sat, May 21, 2005 at 06:19:27PM +0200, Ivan Krstic wrote:
> Matt Gline wrote:
> > Would it work if eecs implemented graylisting too? 
> 
> Yeah, that would be the ideal solution.
> 
> > Who knows if they
> > would or should but it's something to think about - in particular
> > because I think fas implements graylisting
> 
> FAS uses RBLs, but not greylisting.
> 
> -IK


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