Milter-greylist

Hello,

> By the way, our database holds only 35000 entries; could there be some
> memory leak ? hmmm..

It could, I found some for our environment with an unknown origin outside
the reach of milter-greylist or libmilter, deep down at thread creation or
libbind.
We monitor milter-greylist usage, which is a good thing anyway. If it grows
beyond a threshold of real memory usage, we stop it, and reduce greylist.db by
- all entries with no valid recipient (LDAP knowledge, address form)
- all greylist entries of sending IPs with too many recipients
which eliminates 80%, and start milter-greylist afterwards.
This cycle takes ~ 5 seconds and hurts nobody, sendmail defaults to temporary rejection.

M. Fromme