Email Header Analyzer
Paste raw email headers — see the route from sender to inbox, time per hop, plus SPF/DKIM/DMARC verdicts. Useful when an email lands in spam or takes too long.
Paste headers (Gmail: ⋮ → Show original)
Headers are parsed in your browser. Paste only the header block to keep the message body off this page entirely.
FAQ
Where do I find raw email headers?▼
Gmail: open the email → ⋮ menu → Show original. Outlook: open → File → Properties. Apple Mail: View → Message → Raw Source. Most clients have a 'view source' equivalent.
Is my email content sent anywhere?▼
No. The headers are parsed entirely in your browser. Even better — paste only the header block (above the empty line before the body) and there's no message content to leak.
What does the SPF/DKIM/DMARC result mean?▼
These are pulled from the receiving server's Authentication-Results header — what the mailbox provider actually decided. 'pass' means good; 'fail', 'softfail', 'neutral' or missing means the sender didn't authenticate the way they claimed and the email is at higher spam risk.
Why does the journey timing have negative numbers sometimes?▼
Mail servers often have slightly out-of-sync clocks. A 'hop took -3s' usually means the receiving server's clock is a few seconds behind the sending server's. We show the raw arithmetic so you can spot real delays vs. clock skew.
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