On 26 September 2007, Craig Skinner <[EMAIL PROTECTED]> wrote:
> Liviu Daia wrote:
> >
> > How does spamd distinguish between a legitimate retry and a
> > re-injection of the same message with the same Message-Id, sender
> > etc.?
>
> It doesn't.
>
> Just what you described would probably be within the default 25 mins
> grey period.
Why should it? The second copy is sent in a separate run, that's
the whole point. The only thing the bot has to figure out is how long
to wait until the second run. A smart one would send a second copy
after 10 minutes, and a third one after, say, 35 minutes.
> Another delivery attempt would be needed after this time to pass
> spamd.
Moral: randomize the greylisting time...
Regards,
Liviu Daia
--
Dr. Liviu Daia http://www.imar.ro/~daia
