[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?


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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