November 25, 2016: The MegaRBL domain name has expired and as a result queries may result in unexpected DNSBL implementation behavior.

Please stop using MegaRBL immediately.

• If you are an end user and your mail has been returned as undeliverable...
  and the bounce notification references dnsbl.njabl.org you'll need to contact the intended recipient by phone or other means and ask them to contact their email provider to remove all references to rbl.megarbl.net.
  
  
• If you are an end user and you visited a blacklist monitoring website...
  and you've seen that your IP address is listed please let the blacklist monitoring website know that rbl.megarbl.net is no longer active and needs to be removed. Since the vast majority of mail admins don't consult this list it should have no impact your mail delivery.
  
  
• If you are a blacklist monitoring organization...
  please cease checking against rbl.megarbl.net.
  
  
• If you are a mail server administrator...
  and your mail server is rejecting or flagging mail as spam because of rbl.megarbl.net please remove rbl.megarbl.net from your list of checks. In the future you'll want to make sure that you periodically check the operational status of all blacklists that you consult.