By default, you compose new Outlook messages in HTML mode. Even though you do not see actual HTML tags and do not have to edit them, it is HTML that makes your messages look like traditional documents. Thanks to the code that underlies the text, you can use various fonts and special effects, create bulleted lists, and paste pictures in the body of your message. HTML offers broad formatting opportunities and works just fine in all email clients that support it – unless your recipient prefers viewing new messages in plain text.