If you query the legacy DNSBLs via DigitalOcean move to Spamhaus Technology's free Data Query Service
If you are currently accessing the free DNS Blocklists (DNSBLs) via the Public Mirrors, and you’re using DigitalOcean infrastructure - you'll need to make some minor changes to your email infrastructure. The changes are easy to implement, but if you fail to do so, you could find that at some point post-February 14th 2024, all or none of your email is blocked!