Email Header Analyzer
Analyze email headers for routing, authentication, and security
Paste your email headers below to analyze the email's journey, authentication status, and identify potential delivery issues or security concerns.
Email Headers Input
Paste the complete email headers (including Received, Authentication-Results, etc.)
How to Get Email Headers
Gmail:
- Open the email you want to analyze
- Click the three dots menu (⋮) in the top right
- Select "Show original"
- Copy the entire content that appears
Outlook (Web):
- Open the email
- Click the three dots menu (...) next to Reply
- Select "View message source"
- Copy the headers from the popup window
Apple Mail:
- Select the email
- Go to View → Message → All Headers
- Or use keyboard shortcut: Shift+Cmd+H
- Copy the visible headers
Thunderbird:
- Open the email
- Press Ctrl+U (or Cmd+U on Mac)
- Or go to View → Message Source
- Copy the headers from the source view
Understanding Email Headers
Email headers contain metadata about an email's journey from sender to recipient. They include routing information, authentication results, and security checks that help identify delivery issues and verify email authenticity.
Key Header Categories:
Routing Headers
Track the email's path through mail servers (Received, Return-Path)
Authentication Headers
Verify sender identity and email integrity (DKIM, SPF, DMARC)
Content Headers
Basic email information (From, To, Subject, Date)
Security Headers
Spam filtering and security scan results
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About Our Tools
Professional-grade email and DNS diagnostic tools trusted by IT professionals worldwide.
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