Email Security

SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI

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About Email Security Check

Guide

Audit SPF, DKIM, DMARC, MTA-STS, TLS-RPT, and BIMI in one pass.

Detect Leaks

Surface privacy leaks your VPN might miss.

Stay Protected

Clear steps to fix issues and harden settings.

Fast & Free

Runs in seconds, no account required.

What this test checks

  • SPF record & policy
  • DKIM selectors
  • DMARC policy & reports
  • MTA-STS / TLS-RPT / BIMI

How we judge PASS / FAIL

PASS: strict SPF/DMARC, DKIM valid, MTA-STS present, TLS-RPT enabled.

How to fix common issues

  • Tighten SPF (avoid ~all)
  • Publish DMARC with p=quarantine/reject
  • Add DKIM and rotate keys
  • Enable MTA-STS & TLS-RPT

Frequently asked questions

High-level purpose and when to run it.

No; tests use read-only checks and never send mail.

Short summary of your scoring/logic.