Domain Health
Domain Health Checker
One score for your whole domain: DNS, mail delivery and email authentication.
No signup required • Fast DNS lookup • Privacy-focused
How the score works
Each check contributes points: DNS resolution 15, address records 10, MX 15, SPF 15, DMARC 20, DKIM 15, nameservers 5 and CAA 5.
Nothing is scored as passing unless it was actually verified. Anything we could not evaluate — DKIM without a selector, for example — is marked not checked and left out of the score instead of being assumed good.
Reading your grade
90–100 is excellent, 75–89 is good, 50–74 needs attention and anything below 50 is critical. Each failing check comes with an explanation and a recommended fix.
Frequently asked questions
More free tools
DNS CheckerInspect every published DNS record for a domain.DNS LookupRaw A, AAAA, MX, TXT, NS, CNAME, SOA and CAA lookups.MX CheckerConfirm the mail servers that receive your email.SPF CheckerValidate the SPF record that authorises your senders.DKIM CheckerLook up the DKIM key published at your selector.DMARC CheckerRead your DMARC policy and reporting setup.