How do i embed html in outlook?Įmbedding HTML into Outlook email. Insert File window will be open, select your html files. Click the Attach File button under include sections. In the new email window, by default message tab will be selected. You can insert the HTML template in Microsoft outlook by using following steps: Open your outlook and click New Email button. › Systems Engineering Information Technologyįrequently Asked Questions How do you insert html in outlook?.