Test an email

Send a real email to a one-time address and see, step by step, how a receiving server judges it: the sending server, SPF, every DKIM signature, and DMARC alignment.

Create a test address

Or analyse an email you already received

Paste the headers (or the full source) of any email to see how it was authenticated. In Outlook: open the message, then File → Properties → Internet headers. In Gmail: the three dots → Show original.

Analyse