Dnsbl

ORF Enterprise Edition 2.1

High-performance anti-spam tool for Exchange Server

License: Commercial , $198.00 to buy.
Size: 3.55MB
Release date: 5th September 2005

Anti-Spam Blacklist Thing 1.1

Easily query up to 20 different anti-spam blacklists

License: Freeware
Size: 1.00MB
Release date: 30th August 2007