From: Robert Felber (r.felberek-muc.de)
Date: Thu Nov 02 2006 - 01:59:27 CST

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On Thu, Nov 02, 2006 at 08:52:34AM +0100, Robert Felber wrote:
> On Wed, Nov 01, 2006 at 10:00:55PM +0100, Folkert van Heusden wrote:
> > Hi,
> >
> > I'm using sqlgrey together with postfix.
> > Would it be possible to do selective greylisting triggered by an
> > rbl-list?
>
> I fail to see the reason behind this. You can do selective greylisting based
> on regular expression: either greylist host which have common dns names used
> for dynamic clients (such as (cable|pool|dyn|\d.\d\.d\.d)\..*\..* or those
> who do NOT match a regex like (smtp|mail|mx).*\..*\..*
>
> If you want to use RBLs which list dynamic clients only then you may use for
> instance policyd-weight with following configuration:
>
> file /etc/policyd-weight.conf:
>
> $dnsbl_checks_only = 1;
> $MAXDNSBLHITS = 0;
> $MAXDNSBLMSG = 'check_greylist';
                       ^^^^^^^^^^^^^^^^

This should probably be
$MAXDNSBLMSG = 'check_greylist ';
                                    
Policyd-weight returns then the string
"check_greylist ; check http://rbls.org/?q=$ip"

Usually it returns
"550 Your MTA is listed in too many DNSBLs; check http://rbls.org/?q=$ip"

I am not certain how postfix treats garbage in case of restriction classes.

--
    Robert Felber (PGP: 896CF30B)
    Munich, Germany

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