Email Header Analyzer
Analyze email headers for authentication status, routing path, and security warnings. 100% client-side - your headers never leave your browser.
How to Get Email Headers
Gmail:
Open the email → Click three dots (⋮) → "Show original" → Copy headers
Outlook:
Open the email → File → Properties → Copy "Internet headers"
Yahoo Mail:
Open the email → More (…) → "View raw message" → Copy headers