greylisting with procmail
Ed Greshko
Ed.Greshko at greshko.com
Tue Feb 6 13:36:07 UTC 2007
Martin Marques wrote:
>> 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! ;-)
OK, close enough to 0 to be meaningless. And if we really want to be
accurate, my system will continue to respond with temporary error for 5
minutes. So, if the sending system retries every minute it will get 5
temporary errors. The default setting for most MTA retries is 15 minutes.
So, really, it can be a maximum of 15 minute delay on the first message from
a given server. But, after that negligible.
> 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
OK, how about the Western Pacific Southern Hemisphere?
--
I kissed my first girl and smoked my first cigarette on the same day.
I haven't had time for tobacco since.
-- Arturo Toscanini
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