Runs entirely in your browser

Inspect an email's headers, signatures, and DMARC.

Drop in a raw .emlfile (or paste the "Show original" text) and get a plain-language breakdown of who really sent it, whether it was tampered with in transit, and how it travelled to the inbox.

Private by default. Parsing happens on this page, so your email is never uploaded, stored, or logged. The two optional checks below are clearly labelled: a live DNS re-check queries a public DNS resolver (not us), and the deep check sends only the sender domain and IP to our server, never your message.
…or paste the raw message text