See "Email Step 2 - Compose and Build"
See "Email Step 3 - Choose Recipients"
Before you send your email, there are a number of things you should do:
While a text version of the email is not required to send out an email campaign, it’s a good idea to always include one for several reasons.
To create your text-only version:
Make sure the text email contains the highlights of your message in a clear and simple to read way.
It is highly recommended that you send a test message before publishing. Because each email system is slightly different, it is recommended that you test across a number of email systems such as Outlook, Gmail, Yahoo Mail, etc.
There is a limit of 50 recipients to whom you can send test email.
See "Email Step 5 - Schedule Email"
See "Email Step 6 - Final Review and Send"