Email Header Analyzer

Paste raw email headers to trace the delivery path, inspect authentication results (SPF, DKIM, DMARC), and identify routing delays.

Paste only the headers section — not the email body.

How to get your email headers

Email headers contain the full delivery path and authentication metadata for a message. To access headers:

  • Gmail: Open the email → three-dot menu → "Show original" → copy the raw headers section.
  • Outlook: Open the email → File → Properties → "Internet headers" box.
  • Apple Mail: Open the email → View → Message → All Headers.
  • Thunderbird: Open the email → View → Headers → All.

This tool analyzes SPF, DKIM, and DMARC authentication results, traces each mail server hop with timestamps, calculates per-hop delivery delays, and surfaces any spam scoring metadata.