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How to Get Email Headers

Step-by-step instructions for extracting email headers from popular email clients

Gmail (Web & Mobile)

Desktop/Web:

  1. Open the email you want to analyze
  2. Click the three dots menu (⋮) in the top-right corner of the email
  3. Select "Show original" from the dropdown menu
  4. A new window will open showing the full message source
  5. Click "Copy to clipboard" button at the top
  6. Paste the headers into HeaderScope

Mobile App (iOS/Android):

  1. Open the Gmail app and select the email
  2. Tap the three dots menu (⋮) in the top-right
  3. Scroll down and tap "Show original"
  4. The headers will open in your browser
  5. Long-press to select all text, then copy

Outlook Desktop (Windows/Mac)

Windows:

  1. Double-click to open the email in a new window
  2. Go to File → Properties
  3. In the Properties dialog, look for the "Internet headers" section
  4. Select all the text in the Internet headers box (Ctrl+A)
  5. Copy the headers (Ctrl+C)
  6. Paste into HeaderScope

Mac:

  1. Select the email (don't open it)
  2. Go to View → Message → All Headers
  3. The headers will appear at the top of the email
  4. Select and copy all the header text
  5. Paste into HeaderScope

Outlook.com / Office 365 (Web)

  1. Open the email you want to analyze
  2. Click the three dots menu (⋯) in the top-right corner
  3. Select "View" → "View message details" (or "View message source")
  4. A pop-up window will appear with the full headers
  5. Select all the text (Ctrl+A or Cmd+A)
  6. Copy and paste into HeaderScope

Apple Mail (macOS/iOS)

macOS:

  1. Select the email (single-click, don't open)
  2. Go to View → Message → All Headers (or press Shift+Cmd+H)
  3. The complete headers will appear above the email body
  4. Select all the header text
  5. Copy and paste into HeaderScope

iOS (iPhone/iPad):

  1. Open the email in the Mail app
  2. Tap "View" (may need to tap details first)
  3. Tap "View All Headers" or scroll down to see headers
  4. Long-press on the header text to select all
  5. Tap "Copy"
  6. Paste into HeaderScope

Yahoo Mail

  1. Open the email you want to analyze
  2. Click the three dots menu (⋯) or "More" option
  3. Select "View raw message" or "View full header"
  4. The full message source will appear in a new window
  5. Select all text (Ctrl+A or Cmd+A)
  6. Copy and paste into HeaderScope

Mozilla Thunderbird

  1. Select the email in your inbox
  2. Press Ctrl+U (Windows/Linux) or Cmd+U (Mac)
  3. OR go to View → Message Source
  4. The message source window will open with full headers
  5. Select all text (Ctrl+A or Cmd+A)
  6. Copy and paste into HeaderScope

Other Mobile Email Apps

Most mobile email apps have similar options to view message headers:

  • Look for "Show original", "View source", or "Message details"
  • Check under the three-dots menu (⋮) or settings icon
  • Some apps may require viewing the email in a browser first
  • Headers might be under "More info" or "Properties"

What to Include

Copy ALL the headers - not just the first few lines!

Email headers typically start with lines like:

  • Received: from mail.example.com...
  • From: sender@example.com
  • To: recipient@example.com
  • Subject: Email subject
  • Date: Wed, 1 Jan 2026...

The more complete the headers, the more accurate the analysis. HeaderScope needs the full routing information to trace the email's journey and verify authentication.

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