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Email Header & Authentication Analyzer

Parse raw email headers locally, reconstruct delivery timing, review authentication alignment and suspicious clues, and create a sanitized copy for support sharing.

Only the header section is retained and analyzed in a local Worker. Message bodies and attachments are discarded and no DNS or reputation lookup is performed.

Email header

In Gmail use Show original; in Outlook open message properties and copy Internet headers.

About Email Header & Authentication Analyzer

Explain delivery hops and recorded SPF, DKIM, DMARC, and ARC results. Parse raw email headers locally, reconstruct delivery timing, review authentication alignment and suspicious clues, and create a sanitized copy for support sharing. The core workflow is designed to run in your current browser.

Key capabilities

  • Explain recorded SPF, DKIM, DMARC, and ARC results and domain alignment
  • Reconstruct Received hops, timestamps, TLS hints, and delays
  • Flag mismatches, conflicting results, Punycode, and timing anomalies as review clues
  • Mask mailboxes, IPs, hosts, identifiers, subjects, and signatures before export

Useful for

  • Investigate delayed or unexpectedly routed mail
  • Review authentication and identity mismatches without an absolute phishing verdict
  • Create a reduced-risk header copy for a support case

Frequently asked questions

Is Email Header & Authentication Analyzer free to use online?

Yes. Email Header & Authentication Analyzer opens in a modern browser and does not require desktop software installation.

What is Email Header & Authentication Analyzer useful for?

Common use cases include Investigate delayed or unexpectedly routed mail; Review authentication and identity mismatches without an absolute phishing verdict.

Is my input or file uploaded?

The core processing workflow is designed to run locally in the browser. Key capabilities include Explain recorded SPF, DKIM, DMARC, and ARC results and domain alignment, Reconstruct Received hops, timestamps, TLS hints, and delays, Flag mismatches, conflicting results, Punycode, and timing anomalies as review clues; account, comments, and anonymous analytics may still create normal site requests.

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