Milter-greylist

Hi,

When most recently turning on the SPF facility in milter-greylist, I must say
I'm very happy with the results. Using the SPF blacklist functionality I've
been able to reduce even further the already little amount of spam making it
into the servers.

For my stats, spam making it in (to be processed by other filters) has reduced
from 1.5% to 0.5% at the end of each day.

I'm glad I did this so looking at other email verification techniques (like
DKIM and digitally signing outgoing emails like Yahoo does) would it be a good
idea to implement support for this in milter-greylist?

I currently use the Mail::DKIM perl module for SA to score for DK signed emails.

Michael.