I'm using Entourage 10.1.1 on OS 10.2.1 and having a weird time figuring this out: I want to send an email message written in HTML markup, so I'm writing the message, being sure to have first clicked ...

Many people are sending HTML e-mail for no obvious reason or benefit. HTML e-mail can be recognized by colored backgrounds or typefaces. It sometimes has designs or other decorations in the messages.