A LITTLE LESS GUESSWORK

Inspect the evidence.
Find your next step.

Focused tools for email authentication. Clear explanations, useful limits, and no account required.

Email header analyzer

Understand SPF, DKIM, and DMARC results. Your headers stay in your browser.

Read the DNS setup guide while we prepare live domain checks.

These tools inspect configuration and reported evidence. They do not send test messages or measure inbox placement.