Milter-greylist

We have deployed milter-greylist on all our gateway servers with great 
success. We noticed an immediate and (so far) permanent reduction in 
spam getting through.

I have a few (4 out of 6k) clients who are complaining about the new lag 
in mail delivery. We can handle the clients but our sales force is now 
convinced that we will all starve, become destitute, and have sell our 
bodies to medical research to feed our families.

However, I have found that if I tell sales that our competitors are 
throwing monkey poo, they will demand a truckload of bigger monkey poo. 
So If I can say "Our competitors are using greylisting", sales will go away.

Is there a list of large mail providers who are using Greylisting to 
combat spam? I have the link from greylist.org, and I have found some 
others by searching. Just curious if anyone had a list of known greylist 
users.

Thanks,

DAve

-- 
Three years now I've asked Google why they don't have a
logo change for Memorial Day. Why do they choose to do logos
for other non-international holidays, but nothing for
Veterans?

Maybe they forgot who made that choice possible.