How to Convert Plain Text e-mail to HTML (Outlook on Windows)
Sometimes you may receive an e-mail that is in plain text format in Outlook. When you open the e-mail many of the features in the Ribbon are disabled. You can enable these features by converting the e-mail into HTML format. This will come in handy when you need to reply/forward this e-mail and you want to include a hyperlink, an image, change the font color, etc.