How to view the original message in Outlook

Check out this:

http://email.about.com/od/outlooktips/qt/How_to_View_the_Complete_Message_Source_in_Outlook.htm

For the sake of not lose the information if the page is down:

• Type “regedit”.
• Hit Enter.
• Go to HKEY_CURRENT_USER\­­Software\­­Microsoft\­­Office\­­12.0\­­Outlook\­­Options\­­Mail.
  • For Outlook 2003, go to HKEY_CURRENT_USER\­­Software\­­Microsoft\­­Office\­­11.0\­­Outlook\­­Options\­­Mail.
• Select Edit | New | DWord from the menu.
• Type “SaveAllMIMENotJustHeaders”.
• Hit Enter.
• Double-click the newly created SaveAllMIMENotJustHeaders value.
• Type “1”.
• Click OK.
• Close the registry editor.
• Restart Outlook if it has been running.

The source of the message will appear under View → Options → internet headers.