Free tool

Who really sent
this email?

Paste the headers to see the route it took, its SPF, DKIM and DMARC results in plain English, and anything that looks off.

No account required to use this tool.

Read in your browser. The headers aren't sent anywhere or saved.

How to find and read email headers

Keep your own domains' email in order.

Lemon Domains keeps every domain in one list across registrars and watches each one's SPF, DMARC and mail setup for changes.