Milter-greylist

On Mon, May 30, 2005 at 12:13:31PM +0200, Martin Paul wrote:
> Many greylist users want to reduce the number of valid messages
> being delayed by greylisting. I've had a close look on spam and
> non-spam messages in the past, and a simple pattern seems to be
> that messages with a sender like "user@..." which come
> from a sender DNS name like "mailhost.domain.com" are never spam.

I wouldn't tie that to the hostname but to the MX records:
If you got an e-mail from "user@..." from IP address 1.2.3.4
and at least one of the MX records for "domain.com" points to a host
whose name resolves to 1.2.3.4 it is probably not spam.

[And even if it is spam you are probably dealing with a real mail server
 which will retransmit anyway.]

> Comments anyone, or a volunteer to implement it ?

I vote for you.

	Kind regards

-- 
Matthias Scheler                                  http://scheler.de/~matthias/