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Email Header Analyzer

Paste raw email headers to get a plain-English breakdown of SPF, DKIM, and DMARC authentication results, hop-by-hop routing with timing analysis, and phishing indicators. Everything runs in your browser — headers never leave your device.

Paste raw email headers here

Headers never leave your browser. Nothing is transmitted or stored.

How to get raw email headers

Gmail

Open the email. Click the three-dot menu (⋮) in the top right of the message. Select "Show original." Copy everything in the headers section above the line.

Outlook (Web)

Open the email. Click the three-dot menu, then "View → View message source." The headers are at the top of the source, above the blank line.

Apple Mail

Open the email. Go to View → Message → Raw Source. You can also use View → Message → All Headers for a formatted view.