greylisting with procmail

[Martin Marques]

Ed Greshko escribió:
> Tim wrote:
>> On Tue, 2007-02-06 at 04:21 +0800, Ed Greshko wrote:
>>> FWIW, grey listing has cut incoming spam here by 80%.
>>
>> What sort of time delay do you find it adds to getting your mail?
> 
> None.  The greylist milter has a cache.  The very first time a system 
> contacts mine there will be a 5 minute delay.  After that....0.

Almost! ;-)

When a mail comes in, it checks the triplet client_ip/sender/recipient 
to see if a mail has been sent before with that triplet. If it has, the 
mail passes OK. If not, mail is bounced with a termporary error (this 
tells the clients mail server to try again in 5 minutes), and the 
triplet it temporarly saved. In five minutes the same mail gets sent 
again and the server accepts it. :-)

> Nope, not have any problems your seeing.  Must be a Souther Hemisphere 
> thingy.

Naahhh. :-D

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Martín Marqués          |   Programador, DBA
Centro de Telemática	|     Administrador
                Universidad Nacional
                     del Litoral
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