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Email Header Analyzer

Paste the full headers of a message to see its path, delays and authentication results. Everything runs in your browser; the headers never leave your device.

Where do I find the headers?
  • Gmail: open the message, ⋮ menu, Show original, copy everything above the message body.
  • Outlook: open the message, File (or ⋯), Properties / View message source, copy Internet headers.
  • Apple Mail: View, Message, All Headers.
  • Roundcube webmail: open the message, More, Show source.

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Lanetti email Business email that lands in the inbox SPF, DKIM and DMARC set up for you, spam filtering in and out, webmail on your own domain. Hosted in Helsinki. See email hosting