Milter-greylist

> I just thought of the following feature for milter-greylist, since
> milter-greylist is already familiar with all smtp communications and can
> keep statistics regarding the amount of email blacklisted, whitelisted,
> greylisted and delay times.
>
> What I would ideally like to have is a smtp server whitelist which is
> determined based on a minimum number of accepted messages from this server.

it seems that a percentage would make more sense.  and i think it would 
also make sense if it had a lifetime associated with it.  just because a 
server is behaving today doesn't mean it will still be nice next week.