You mean HTML body
If so we can write the HTML tags in the body property of the Sen diutkook mail or send exchange mail activity and enable the property ISHTMLBODY
Simple isn’t it
Here you can get clear idea about Sending mails from outlook.
Hello, You can send HTML body using Outlook you just need to make sure isBodyHTML is checked on
If you want to send HTML tag (tables) then Append Data using Variable and Pass the Variable in body section of send Outlook Mail Activity. For more details You can refer below link :