You should always send a Test Message to yourself to review how it looks and reads before sending it to a large number of people.
Click the menu tab Messaging, then click 'Send Message'.
To send a Test Message to yourself, select 'Send Test To', type in your email, and press the 'Send' button.
Below is an example of how an HTML Message might look.
When you are happy with your Message, go to either
Send Your Message To a Mailing List or
Send Your Message to Subscribers of a form.