Question 1

What does this email auth checker include?

Accepted Answer

This email auth checker runs a combined SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT review so a team can see sender posture in one run instead of jumping across single-record tools.

Question 2

Why is this useful if individual checkers already exist?

Accepted Answer

Single checkers are best for deep troubleshooting. This page is better when you need the first answer about overall domain posture before deciding which detail page deserves the next investigation step.

Question 3

Do I need a DKIM selector?

Accepted Answer

No, but it helps. If you know the selector, include it so the DKIM result reflects the exact record you care about rather than a best-effort probe.

Question 4

When should teams use a combined auth checker?

Accepted Answer

It is strongest before campaign launches, during sender migrations, and during deliverability incidents when multiple DNS trust signals may have drifted at once.

Free SPF, DKIM, DMARC, BIMI, and email auth checker

Check the full sender-auth stack for a domain