About the Domain Checker
A domain health check reviews everything receivers look at before they trust your mail: name servers, MX records and their IPs, reverse DNS, SPF and its lookup count, DKIM keys, DMARC policy and reporting, MTA-STS, TLS-RPT, BIMI and blacklist status.
Every item is marked pass, warning, fail or unknown, and the score only counts what could actually be verified. Fix the failed items first — they have the biggest impact on deliverability.
What is checked?
Name servers, SOA, MX records, reverse DNS, SPF (with lookup count), DKIM selectors, DMARC policy and reporting, MTA-STS, TLS-RPT, BIMI, DNSSEC, SMTP & STARTTLS on the primary MX, domain and IP blacklists, and domain age.