About formatting an e-mail message
You can send and receive an e-mail message in two formats: HTML or Plain text. You can change the look of an HTML message, but not a plain text message.
You can format text with numbering, bullets, alignment, and different font types, styles, and colors. You can also insert pictures, files, hyperlinks, and your signature text to an e-mail message.
How do I...?
Select the text format for e-mail messages
Format e-mail text using styles