in.dnsbl.org must not be used for mail filtering

[Mark Jeftovic <markjr () easydns com>]

in.dnsbl.org was created several years ago for commercial DNS providers 
to share information about problem domains and to offer a mechanism to 
prevent abusers from hopping from DNS provider to provider.

Under no circumstances should it be used by any MTA for mail filtering 
in any capacity whatsoever. Absolutely no vetting goes into in.dnsbl.org 
listing and domains can get listed for internal reasons which are purely 
meaningless in an email context.

Over the years some big name domains have wound up in the in.dnsbl.org 
zone for reasons which have absolutely nothing to do with email and 
simply for inter-provider communications between the DNSBL.org members.

In short, using in.dnsbl.org on any MTA is an act of mind-numbing 
recklessness. Don't do it.

Thank you for your time.

-mark

--
Mark Jeftovic <markjr () easydns com>
Founder & President, easyDNS Technologies Inc.
ph. +1-(416)-535-8672 ext 225
fx. +1-(866) 273-2892