Using an external DNS service
If you want or have to use an external DNS service, you can define it in
forward-zone: name: "." forward-addr: 188.8.131.52 forward-addr: 184.108.40.206
Please do not use a public resolver like we did in the example above. Many - if not all - blacklist lookups will fail with public resolvers.
Important: Only DNSSEC validating DNS services will work.
Restart Unbound after changing its config file:
docker-compose restart unbound-mailcow