Email Domain Health Check
Free email domain health check. Runs SPF, DKIM, DMARC, MX, BIMI, MTA-STS, TLS-RPT and DNSSEC in parallel and grades your domain A to F with plain-English fixes.
About the Email Domain Health Check
This free domain health check runs the eight checks every sending domain needs - MX, SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT and DNSSEC - in parallel, and grades the result from A to F. It is the fastest way to see your domain the way Gmail, Outlook and Yahoo see it before they decide whether to trust your mail.
Each check returns a plain-English verdict and, when something fails, the exact fix. Start here if you are not sure which record is hurting you - then use the dedicated per-record tools for a deeper look.
Frequently asked questions
What does an email domain health check test?
It tests the DNS records receivers evaluate on every message: MX (can you receive), SPF and DKIM (authentication), DMARC (policy), BIMI (brand logo), MTA-STS and TLS-RPT (transport security) and DNSSEC. The result is graded A to F.
What is a good domain health score?
An A means all core protections are present and correctly configured. Most domains score C or lower on first check - usually missing DMARC enforcement, MTA-STS or DNSSEC. The report tells you exactly what to fix first.
How often should I check my domain health?
After any DNS or provider change, before scaling sending volume, and periodically (monthly is sensible) - records drift, keys get rotated, and providers change requirements like the Gmail and Yahoo bulk-sender rules.
Did this check reveal a problem?
Postbox Consultancy Services fixes email deliverability for a living - 500+ clients over 10+ years. Authentication, blacklist recovery, cold email infrastructure and full audits.