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Gmail Header Analysis Tutorial
Learn to read Gmail “Show originalheaders to debug auth.
1 min read
Updated 2025-10-24
Tutorials
gmailheadersanalysis
Gmail’s original view reveals SPF/DKIM/DMARC results and sending paths.
Steps
- Open Show original in Gmail
- Check authentication results
- Trace sending source and failures
FAQ
DMARC fail but SPF/DKIM pass?
Likely alignment mismatch or forwarding changes identifiers.
Validation & Screenshots
Gmail: Show original
- Open the test email three-dot menu Show original
- Confirm
SPF: PASS,DKIM: PASS, andDMARC: PASSwith alignment - Review Authentication-Results section for alignment domains
Screenshot placeholder: /assets/guides/common/gmail-show-original.png
Outlook: Message Header Analyzer
- Open Outlook on the web
- Open the test email three-dot menu View View message details
- Alternatively paste headers into Header Analyzer
Screenshot placeholder: /assets/guides/common/outlook-header-details.png