Better Living Through Thinking

Milter-Greylist

Tue, 15 Jun 2004

I've updated to the latest milter-greylist from FreeBSD ports (1.3.8). It has a new 'domain' whitelist option, which allows you to whitelist incoming connections from a particular domain (via double reverse DNS lookup). It also has a 'lazylaw' option which whitelists an IP instead of a sender/IP/recipient tuple. Also new is the 'dumpfreq' options which specifies how often to dump to the greylist database (i.e., if you're on a busy server, dumping for each transaction can become expensive). One final nice option is the 'timeout' option, which removes greylisted addresses after a certain period.

Here's an updated histospam:

20040607 => ****** (32)     <=== sendmail milter-greylist feature enabled on 7 June 2004:
20040608 => *** (18)
20040609 => ** (12)
20040610 => *** (17)
20040611 => ** (13)
20040612 => * (7)
20040613 => * (9)
20040614 => *** (15)
20040615 => *** (17)
20040616 => ** (10)
20040617 => *** (17)
20040618 => ** (12)
20040619 => ** (12)
20040620 => ** (13)

And down it goes...