Spamhaus has gone mad

[kpv]

Indeed that was the cause of the problem that you described.

We discussed it in the past here:

Rejecting incoming messages - zen.spamhaus.org

Is your HestiaCP DNS server querying the DNSBLs (like SpamHaus) directly or using a forwarder? Because if your HestiaCP server forwards all DNS queries via some public DNS (e.g. Google’s 8.8.8.8 or Cloudflare’s 1.1.1.1) or even some larger ISP (Hetzner), then the DNSBLs often won’t work. Yes, but why block queries from public recursive name servers? It’s simple – public recursive name servers act as an anonymizing service and enable large-scale users to hide behind them. Given the lack of tr…