Milter-greylist

This patch allows you to define sender+recipient exception pairs in 
greylist.conf. The syntax is the same as existing "from" clause, but you 
can put an additional destination recipient (non-regex) match on the end 
after a comma. E.g.

from user@...,user@...

I'm a yacc noob so forgive the ugliness.

I tested this and it seems to work for me.

    http://bani.anime.net/fromto.diff

-Dan