🔒 Privacy Notice
All analysis is performed locally in your browser. Your email headers are never sent to our servers. This tool helps you identify phishing attempts, trace email origins, and verify sender authentication.
Paste Email Headers
Copy the full email headers from your email client and paste them below. How to find email headers →
How to Find Email Headers
Gmail
- Open the email
- Click the three dots (⋮) menu
- Select "Show original"
- Copy all text from the top
Outlook (Web)
- Open the email
- Click the three dots (⋯) menu
- Select "View" → "View message source"
- Copy the headers section
Apple Mail
- Open the email
- Go to View → Message → Raw Source
- Or press ⌥⌘U
- Copy the headers before the blank line
Yahoo Mail
- Open the email
- Click the three dots (⋯) menu
- Select "View raw message"
- Copy the headers section
Understanding Email Headers
Why Headers Matter
Email headers contain metadata about the message's journey from sender to recipient. They reveal:
- The actual origin server (not just claimed sender)
- Whether authentication passed or failed
- Signs of spoofing or phishing
- Delays or routing issues
Common Red Flags
- SPF fail: Server not authorized to send for that domain
- DKIM fail: Message was modified in transit
- Mismatched From/Reply-To: Potential phishing
- Suspicious origin: Email claims to be from trusted source but originated elsewhere