After a campaign has been dispatched, a message will be generated for each targeted Subscriber. A message represents a single email. You can view all of your messages by clicking the Messages link in the sidebar. You will notice that there are two types of message:
A draft is a message that has been queued using the
Queue Draft campaign sending behaviour. The Drafts tab offers a listing of every drafted message and allows you to preview the final message before sending. A draft message will only be sent to the subscriber when you click on the Send Now button.
Similarly, the Sent tab offers a listing of every message that has been dispatched. You can use this page to track and filter the status of your messages.