Pro Tip: Enter one email address per line instead of using commas.
When crafting your email, you have two options: you can either build it using the rich text editor (which will convert the message to HTML) or you can send the message as raw text. While rich text allows more flexibility in how a message can be presented, not all mail clients render HTML correctly or at all. You need to research your target in order to know if the rich text editor is appropriate--when in doubt, use the raw editor.
