[Gllug] SPAM - trying to block at SMTP level

[Bruce Richardson]

On Wed, Feb 16, 2005 at 02:44:35PM +0000, Martin wrote:
> Tethys wrote:
> 
> >But I'm curious about where you get your 3 minute figure from. In my
> >
> >experience, 15 or 30 minutes is far more common. Plus, of course, the
> >delay is entirely determined by the configuration of the remote mail
> >server. I've seen sites with a 2 hour delay.
> > 
> >
> 
> They delay only occurs once, the very first time an email from a 
> particular sender ip/domain is received.

Make that sender-ip/envelope-sender/envelope-recipient for all the
common greylisting implementations.  So it's not just the first time an
e-mail is received.  If you weaken that algorithm to just sender-ip and
envelope-sender, you significantly weaken the effectiveness of
greylisting (think about it).


> All future emails will be let 
> through instantly and the TTL of the record updated. 

That is implementation and configuration dependent.

-- 
Bruce

The ice-caps are melting, tra-la-la-la.  All the world is drowning,
tra-la-la-la-la.  -- Tiny Tim.
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