Greylisting enhancements (was: US winning war on spam ?!?!?!)

[Kenneth Porter <sh...@sewingwitch.com>]

--On Wednesday, December 21, 2005 2:39 PM -0500 Matt Kettler 
<mk...@evi-inc.com> wrote:

> Perhaps a better term is "selective greylisting"
>
> I'm Using milter-greylists's acls. My default is to whitelist (ie: not
> greylist) but I have an extensive set of ACLs that use regexes to
> greylist most dialup hosts, and hosts with no RDNS. I also greylist all
> of apnic and lacnic by IP.

Interesting idea.

Over on the MIMEDefang list we came up with an idea for "distributed" 
greylisting, in which one shares one's learned white list via a reverse 
DNSBL. Others can then use regular DNSBL mechanisms with trusted peers to 
allow newcomers to bypass one's greylisting.