ZZoneCheckr
All-in-one diagnostic

Domain Health Checker

Run DNS, email authentication, certificate and HTTPS checks from one screen. ZoneCheckr separates required failures from optional configuration information.

The DKIM selector is optional. Without it, ZoneCheckr reports DKIM as not checked rather than incorrectly calling it missing.

Advertisement

What does Domain Health check?

The checker inspects A, AAAA, NS and SOA records, mail routing, SPF, DMARC and optional DKIM, CAA certificate policy, TLS certificate health, and the domain's HTTPS response. Results are individual checks rather than an arbitrary overall score.