Paste raw email headers to trace routing, verify authentication (SPF/DKIM/DMARC), detect delays, and identify security issues. All analysis happens locally in your browser.
How to Use This Tool
Copy email headers — In Gmail, open the email, click the three-dot menu, and select "Show original". In Outlook, open message properties. Copy the full header text
Paste into the text area — Paste the raw headers, or click "Load Sample" to try with example data
Click "Analyze Headers" — The tool parses all header fields and displays a structured breakdown
Review the results — Check the hop timeline for delays, authentication results for SPF/DKIM/DMARC, and security flags
Export your analysis — Download results as plain text, JSON, or CSV for documentation
Common Use Cases
Is this email legitimate or a phishing attempt? Analyze authentication results and check if the sending server matches the claimed sender domain
Why did my email take so long to arrive? Trace the hop-by-hop timeline to find where delays occurred in the delivery chain
Why is my email being flagged as spam? Check SPF/DKIM/DMARC pass/fail results and spam score indicators in the headers
