Send course invitations straight from a system that knows who you may write to and who you may not.
A campaign combines a course, an e-mail template and a chosen segment of contacts. Before sending, the system walks you through a checklist, leaves out unsubscribed and undeliverable addresses on its own, and every e-mail carries an unsubscribe link. If you switch it on, you will see deliveries, opens, clicks and the most frequently opened links.