Email Domain Health Check in 15 Seconds
Free email domain health check in 15 seconds. Runs SPF, DKIM, DMARC, MX, blacklist, BIMI, MTA-STS, TLS-RPT and DNSSEC in parallel and grades your domain A to F with the exact plain-English fixes. No login.
About the Email Domain Health Check
This free domain health check runs the nine checks every sending domain needs - MX, SPF, DKIM, DMARC, blacklist status, BIMI, MTA-STS, TLS-RPT and DNSSEC - in parallel, and grades the result from A to F in about 15 seconds. 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.
How long does a domain health check take?
About 15 seconds. All nine checks run in parallel (DNS checks over DNS-over-HTTPS, blacklists via our server-side resolver), so you get the full graded report almost instantly - no login and no waiting.
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.