On Wed, 1 Nov 2006, Rick Kelly wrote:
> Is anyone doing greylisting with postfix? It looks like there is nothing
> but the undocumented postgrey out there.

Postfix can use milters [1], so I guess you could use milter-greylist that 
you've just set up with sendmail :-)

[1] http://www.postfix.org/MILTER_README.html

-- 
Stephen