MSRBL.NET appears to be offline
If you are an end user and your mail has been returned as undeliverable...
and the bounce notification references msrbl.net 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 msrbl.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and you've seen that your IP address is listed please let the blacklist monitoring website know that msrbl.net is no longer active and needs to be removed.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 msrbl.net.
If you are a mail server administrator...
and your mail server is rejecting or flagging mail as spam because of msrbl.net please remove msrbl.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.