Step 1: Click the “Send” step.
How to Send a Message (from the send step)
Step 2: Select all of the contacts that you wish to message through checking the boxes to the left of their name on the mailing list (You can quickly select all of your contacts by checking the box at the top of the list).
Step 3: Click "message".
Step 4: Fill out the pop-up window with your message and then press "send".
How to Send a Message (from the message center)
Step 1: Click the “Message Center” in the left navigation.
Step 2: Select your mailing at the top of the page
Step 3: Click "new message."
Step 4: Type your contact names in the "to" line. Or, to send your message to the entire mailing list, use the "quick add group" drop down menu on the right.
Step 5: Press the green "Send Message" button.