On Tue, 6 Feb 2024, Odhiambo Washington wrote:
Today morning I woke up to all emails being rejected as I was using zen.spamhaus.org in my dnslists. Almost all incoming emails - even from gmail.com - were being rejected. Did I maybe miss something?
Are you using your own resolver (like BIND, Knot Resolver, or Unbound) rather than a public resolver (like Cloudflare, Google, or Quad9)? You must else Spamhaus will return 127.255.255.254. If your software blindly treats an A/TXT result as indicating the host is listed then the policy refusal result, 127.255.255.254/"Error: open resolver; ...", will make it seem like the host is listed.
/mark _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
