On Wed, Apr 08, 2009 at 09:09:58AM -0400, Jorey Bump wrote:
>
> It's a shame, because enforcing these checks would have a noticeable
> impact on spam, especially FCrDNS:
>
> http://en.wikipedia.org/wiki/Forward_Confirmed_reverse_DNS
>
> Sadly, I have been unable to uncover a method to use FCrDNS in a scoring
> system. Ideally, I would like to use SpamAssassin, but if anyone knows
> of another way, please share.
Don't bother looking too hard. :) Postfix records FCrDNS in Received-headers
("unknown" if not matching) and SpamAssassin uses that information in
RDNS_NONE rule.
