You can view email messages in two formats.
Plain text. Plain text messages are messages that contain no HTML formatting code. Messages sent in plain text can always be read by other email clients. You can view messages in plain-text mode even if it contains HTML. The HTML tags are displayed in the body of the message in the plain text view.
HTML. HTML messages can have text formatting, numbering, bullets, colored background, and links which can make messages easier to read. Some email clients may not accept messages formatted in HTML.
To always view your email messages in HTML, check the View Mail as HTML (when possible) box on the Preferences>Mail tab. Messages are displayed in formatted layout, if they were sent in HTML.
See Also...