Hi,

> As I understand the idea of graylisting: it is to deny FIRST attempt
> of delivery. Then accept second attempt. What is important as far as
> my idea is concerned: if the second attempt was successful and the
> message was accepted, every next message from the address and the IP
> to the recipient is accepted during the FIRST attempt unless validity
> period for acceptance expired.


> So, my idea was to accept emails not just for only one recipient but
> to everyone IF there was succesful delivery in the past to one of
> recipients on my server and the validity period hasn't expired.
> This way we would avoid unnecessary and time wasting denials.

You must be either hosting couple of user accounts only or
you had never spent a second reading your servers' logs.

Exampke below, just randomly-picked machine I have, todays log
(and I see thousands of this shit daily; replaced target,
legitimate domain with @x, but it does not really matter):

Nov 14 08:48:01 from: [email protected] to: carverwwymtjwb...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:01 from: [email protected] to: cichoc...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:01 from: [email protected] to: s...@x origin_ip: 87.238.155.82
origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:01 from: [email protected] to: account...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:01 from: [email protected] to: g...@x origin_ip: 87.238.155.82
origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:09 from: [email protected] to: cichock...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:09 from: [email protected] to: b6da4...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:10 from: [email protected] to: df68a...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:10 from: [email protected] to: j...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)
Nov 14 08:48:10 from: [email protected] to: rc...@x origin_ip:
87.238.155.82 origin_rdns: (unknown) auth: (unknown)

Thanks to graylisting they are kicked away at doors. Now apply
your graylisting to the above logs and see how it "works" :)

Regards,
-- 
 "Daddy, what "Formatting drive C:" means?"...

 Marcin                       http://wfmh.org.pl/carlos/
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