1. Open up Juno and Sign In.
  2. On the drop down menu click on Options,
  3. choose Email Options (press ctrl-E).
  4. Under Show Message Headers, select the full option.
  5. Click the OK button to save the setting.

Juno version 4+ can display MIME and HTML email, but it does not provide a way of Viewing the HTML Source for the message within Juno.

To get the full source, including HTML codes:

  1. In the Juno mail client, click “file” and then “Save Message as Text File..” (Ctrl-T).
  2. Give the file a name which you will remember (many people save temporary files to the desktop).
  3. Double-click on the resulting file.