Email Header Analyzer

Understand SPF, DKIM, DMARC, ARC, routing, and sender identity from raw email headers.

Email headers may contain addresses, IPs, Message-IDs, and internal hostnames. MXFend analyzes the pasted data for this request and does not store the raw headers.

Paste the complete headers from an email. MXFend analyzes them in memory and does not store the pasted content. Need help finding them?
How to view headers
  • Gmail: open the message → ⋮ menu → "Show original".
  • Outlook: open the message → File → Properties → Internet headers, or the "..." menu → "View message details".
  • Apple Mail: open the message → View menu → Message → All Headers.
  • Thunderbird: open the message → View menu → Message Source (Ctrl/Cmd+U).

Analyzing headers…

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