Free Tool
Email Header Analyzer
Paste raw email headers below to visualize the delivery path, check authentication results, and identify routing delays.
How to find email headers
Gmail
Open the email → click the three dots (⋮) → "Show original" → copy the headers.
Outlook
Open the email → click ⋯ → "View message source" or "View message details".
Apple Mail
Open the email → View menu → Message → All Headers.
Yahoo Mail
Open the email → click ⋯ → "View raw message".