If you want to learn how an incoming email managed its striking look, check the HTML source code on the incoming email.
Edit the HTML Source of a Message in Windows Live Mail and Outlook Express
To edit the HTML source code of a message you are composing in Windows Live Mail or Outlook Express. To return to the default Windows Live Mail or Outlook Express composition window, go to the Edit tab.
Edit the HTML Source of a Message You Receive
If you want to see the HTML source code in a message you receive in Windows Live Mail or Outlook Express: This brings up an editor with the text of the email source in it, where you can view the coding and edit it for your own use.
Turn Off HTML Code Highlighting
If you find the default HTML source highlighting distracting, you can turn it off.