UPDATE
Latest news from SORBS is that impending sunset on blacklist may not be a sure thing afterall. See here for more.

The list master at SORBS announced that, due to contractual problems with the network provider, it may be closing soon. No doubt, you've experienced the love and/or hate relationship with the DNSBL over the years. Its largest receiver footprint was in the educational and non-profit email receiver space due to its no-cost and ease of use. The main point of contention senders generally have had with SORBS is the monetary penalty imposed to get IPs removed. Sender deliverability was affected depending on the mix of recipient addresses in the lists they used.

It comes with great sadness that I have to announce the imminent closure of SORBS. The University of Queensland have decided not to honor their agreement with myself and SORBS and terminate the hosting contract.

I have been involved with institutions such as Griffith University trying to arrange alternative hosting for SORBS, but as of 12 noon, 22nd June 2009 no hosting has been acquired and therefore I have been forced in to this announcement. SORBS is officially "For Sale" should anyone wish to purchase it as a going concern, but failing that and failing to find alternative hosting for a 42RU rack in the Brisbane area of Queensland Australia SORBS will be shutting down permanently in 28 days, on 20th July 2009 at 12 noon.

Continued here ...