Milter-greylist

I am running sendmail/MimeDefang and recently added milter-greylist as 
an additional spam check. The domains in question are regularly hit with 
dictionary-attack type spam where most of the target users don't exist. 
  Sendmail is very quick at rejecting local addresses that are not in 
the aliases or virtuser tables so that is normally not a problem, but 
when milter-greylist is active it wants to greylist even the 
undeliverable addresses.  For the moment I am working around it by 
tracking the 'real' users, including them in the milter-greylist config, 
and restricting greylisting to the specified addresses.  However, it 
would be nicer if this could be handled automatically by letting 
sendmail reject addresses it can't deliver first.  Is there any way to 
do that?

Also, the extra log line about 'skipping greylist because this is the 
default action' for the unprocessed addresses is filling my disks up to 
the point that I had to change the log rotation.  Is there any way to 
turn that off?  When it doesn't do anything, I don't need to know about it.

-- 
   Les Mikesell
    lesmikesell@...