Below is a list of the most popular email clients through which you can view email headers. If you're using a specific email client and need information on how to view headers use the contact page.

Outlook 2007:

• Right click on the email
• Select "Message options..."
• A window will appear. The headers are inside the "Internet headers" window

Visit the view headers in outlook 2007 page to see the video tutorial with pictures.

Hotmail

• Open up the email
• Click on the little drop-down arrow right next to "reply" (top right)
• Select "View Message Source"

Visit the view headers in hotmail page to see the video tutorial with pictures.

Gmail

• Open the message you received
• Click on the little drop-down arrow right next to "reply" (top right)
• Select "Show Original"

Visit the view headers in gmail page to see the video tutorial with pictures.

Yahoo

• Right click on the email (in the email list)
• Click "View Full Header"
• Alternatively you can click on "Actions" (inside the message) then "View Full Header"

Visit the view headers in yahoo mail page to see the video tutorial with pictures.