Milter-greylist

For as long as I have used it, milter-greylist has a policy to 
whitelist mail passing SPF tests by default.   I am finding that most 
successful spam passed the SPF tests.  It is not particularly 
difficult for a dedicated spammer to obtain supportive DNS records.

It seems best for DNS black lists to be applied prior to using any 
results from SPF tests.

Can anyone post or point me to a good working example of a 
greylist.conf which considers DNS black lists prior to using results 
of SPF tests?

Thanks,

Bob
-- 
Bob Friesenhahn
bfriesen@..., http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/