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Email Header Analyzer

Analyze email headers to trace routing, check authentication (SPF, DKIM, DMARC), identify delivery delays, and debug email issues. Paste headers from any email client.

AI Email Header Analyzer

Get AI-powered insights into your email's journey

Powered by Gemini

What can you learn from email headers?

  • Trace the path your email took through servers
  • Check SPF, DKIM, and DMARC authentication results
  • Identify delivery delays and their sources
  • Verify the original sender and detect spoofing
  • Debug email delivery issues

About this tool

This free utility is designed to help email marketers and developers improve their deliverability and campaign performance. At Sequenzy, we believe in providing transparent, helpful tools for the community.

Frequently Asked Questions

In Gmail: Open email → click ⋮ menu → 'Show original'. In Outlook: Open email → click ⋮ → 'View message source'. In Apple Mail: View → Message → All Headers.

SPF/DKIM/DMARC results show if the email passed authentication checks. 'Pass' means verified, 'fail' means it failed verification, 'softfail' is a warning but not a hard failure.

Each server that processes your email adds a 'Received' header with a timestamp. Delays can occur due to spam filtering, greylisting, server load, or network issues.

Check that SPF, DKIM, and DMARC all pass. Look for unusual delays (>30 seconds between hops). Verify the 'From' address matches expectations and trace the path for any suspicious servers.

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