Free tool · No sign-up
Email Security Checker
Check SPF, DKIM, DMARC, MX and MTA-STS so your emails land in the inbox.
- Results in seconds
- 100% free, no account
- Plain-English explanations
- Shareable result link
Running the checks…
This usually takes a few seconds.
What this tool checks
- SPF, DKIM and DMARC — required by Gmail and Yahoo
- MX records, MTA-STS, TLS reporting and BIMI
- A score and plain-English fixes
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