Spam blocklist SORBS closed by its owner, Proofpoint

Proofpoint has shut down SORBS, a two-decade-old DNS-based blocklist used by over 200,000 organizations to identify spam and phishing sources; while the service’s zones have been emptied, its codebase remains intact, prompting discussion of potential acquisition amid concerns about operational costs, the importance of transparent blocklist operations, and the risk of bad-faith control, with alternatives like SpamCop and Spamhaus noted.