Spamhaus has uncovered a fake spam filter company which was pirating and selling DNSBL data stolen from major anti-spam systems including Spamhaus, CBL and SURBL, republishing the stolen data under the name "nszones.com".
more: http://www.spamhaus.org/organization/statement.lasso?ref=8 -- Neil Schwartzman Senior Director Security Strategy, Receiver Services Return Path Inc. [303] 999-3217 Tweets: ReturnPathHelp