From: Michael Elliott
Date: 2005-05-02 15:33:18 -0400
Subject: [SIQ] 001 Re: Re: new feature request
More information..: http://www.milter.info/#Support
> Based on this I've just added a new option, -n, to not grey list the
> null address.
> However, auto white listing just the RCPT as a future sender of a reply
> would certainly be a worth while enhancement, but in the case of
> call-backs its problematic. You would have to auto white list the IPs of
> all the MXes of each RCPT domain in the off chance that they perform a
> Now consider the following example:
> MAIL FROM:<email@example.com>
> RCPT TO:<firstname.lastname@example.org>
Here is an easier method. Double lookup. When -k = MAIL:RCPT:IP.
Greylist entries in the database are checked first as MAIL:RCPT:IP tuple, and
then as MAIL:RCPT. Any entry added to the database from a local user would
add the MAIL:RCPT:IP, and RCPT:MAIL as the auto whitelisting.
A more complicated version would be one that upgrades the RCPT:LOCAL to RCPT:LOCAL:IP.
The way to do that is:
IF match was on RCPT:MAIL, and mail reaches the smfi_eof or smfi_body stage,
upgrade RCPT:MAIL to RCPT:MAIL:IP since it is a full incoming piece of mail.
A new message from localuser would trigger a new RCPT:MAIL to be generated.
the message only went to smfi_rcptto stage, and is a grey listing check, so
Use a short time to live on the RCPT:MAIL entries, as they are expected to
do their callback in seconds to hours. There could be a intermediate MX that
may be greylisted in the middle, so one has to allow for multiple grey listing
I personally had to turn down the database -k to only MAIL:RCPT months ago
because too many servers like gmail round robin their connections.
> Anthony C Howe +33 6 11 89 73 78
> http://www.snert.com/ ICQ:
7116561 AIM: Sir Wumpus
> "held in my arms / his sun washed face / eyes closed" - Anthony
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