Re: 'dialup-ranges?' Re: greylisting DNSBL hosts?

[Fraser Campbell <fraser@georgetown.wehave.net>]

On Friday 08 October 2004 18:09, Kilian Krause wrote:

> Nobody said this is the magic weapon everybody uses and nobody found
> yet, it was just me wondering if these two pieces can't be matched
> together for the final goal. (As I said above, I'm against massive DNSBL
> use on the hardcore scale, so why not try with greylisting?)
>
> So do you still reckon that DNSBL are too far out for using them as a
> greylisting success probability predictor?

It strikes me as an idea well worth trying.  I believe you mentioned exim, I 
haven't used exim in a long time so I can't help you there.

As an aside this would be very easy to implement in postfix (from 
testing/unstable only) using SMTP access policy delegation.  A very simple 
script can be plugged into postfix at the RCPT stage, perform the DUL check 
and greylist as appropriate.  I am working on an access policy delegation 
script right now and may just add checks similar to your suggestion.

Thanks
-- 
Fraser Campbell <fraser@wehave.net>                 http://www.wehave.net/
Georgetown, Ontario, Canada                               Debian GNU/Linux