On 26 September 2007, Damien Miller <[EMAIL PROTECTED]> wrote:
> On Wed, 26 Sep 2007, Liviu Daia wrote:
>
> > Greylisting is trivial to bypass, with or without a queue: just
> > send the same messages twice. Some spammers have figured that out
> > long ago. Ever wondered why sometimes you receive 2 or 3 copies of
> > the same spam, from the same IP, with the same Message-Id etc., a
> > few minutes apart?
>
> That doesn't work, at least not against spamd.
How does spamd distinguish between a legitimate retry and a
re-injection of the same message with the same Message-Id, sender etc.?
Regards,
Liviu Daia
--
Dr. Liviu Daia http://www.imar.ro/~daia
