Email Header Analyzer
Paste raw email headers to inspect the delivery path, authentication results (SPF, DKIM, DMARC), and timing between hops. Headers are parsed entirely in your browser — nothing is sent to our servers.
Gmail: Open email → ⋮ → Show original → copy the header block above the blank line. Outlook: File → Properties → Internet headers. Apple Mail: View → Message → All Headers, then copy.