Open Relay Blacklist provider ORDB has announced it is shutting down.
Its website states:
"We regret to inform you that ORDB.org, at the ripe age of five and a
half, is shutting down. It's been a case of a long goodbye as very
little work has gone into maintaining ORDB for a while. Our volunteer
staff has been pre-occupied with other aspects of their lives. In
addition, the general consensus within the team is that open relay RBLs
are no longer the most effective way of preventing spam from entering
your network as spammers have changed tactics in recent years, as have
the anti-spam community.
We encourage system owners to remove ORDB checks from their mailers
immediately and start investigating alternative methods of spam
filtering. We recommend a combination involving greylisting and
content-based analysis (such as the dspam project, bmf or Spam Assassin).
DNS and the mailing lists will vanish today, December 18, 2006."
MailMarshal customers are advised to disable any ORDB checks by deleting the
ORDB listing in Server Array Properties | Host Validation tab.
More information: http://ordb.org/news/?id=38