Paste any email header to trace the message path, verify authentication (SPF, DKIM, DMARC), detect delays, and diagnose deliverability issues instantly.
No login required. Paste headers and get instant results.
Everything you need to debug email routing and diagnose deliverability issues.
Parse all standard and custom headers including Received, Authentication-Results, and X-headers.
Verify SPF, DKIM, DMARC results. See exactly which checks passed or failed.
Visualize the complete path from sender to recipient with server details at each hop.
Identify slow servers causing delivery delays. See exactly where time was lost.
Automatically detect missing authentication, suspicious routing, and spam flags.
Generate professional analysis reports for clients or documentation.
Start free, upgrade when you need more.
For occasional use
For power users
For support teams
White-label solution
In Gmail: open email â click ⎠â "Show original". In Outlook: open email â File â Properties â Internet headers.
No. All analysis is performed in your browser. We never store or transmit your email headers.
SPF verifies the sender. DKIM confirms the email wasn't altered. DMARC ensures alignment. All should pass.
Each hop is a server that handled your email. Multiple hops are normal with spam filters and security gateways.