Status: Active
Removal:, working in cooperation with is different than most DNS based blacklists. does not maintain a list of IP addresses that have been seen spamming, sending email to honeypots, spamtraps, or any of the other general tactics uses by other DNS blacklists to determine if an email is spam. Instead, they concentrate exclusively on what is called backscatter and sender callouts.

Listing Policy

Listing in comes down to two criteria. If your system is seen sending backscatter or sender callouts, you will be listed. This can be problematic for some email server administrators, as sender callouts are a common misconfiguration of some email servers. It also sounds like a good idea on the surface, to a new email administrator. As long as you read the documentation to your server, and do not allow backscatter or sender callouts, your system will not be listed.