How can I sign up for courses, but not receive promotional emails?

When you signup for courses, you are then placed automatically into our monthly email distribution. 
If you would like to unsubscribe from the promotional email, you can unsubscribe at that time at the bottom of the email. All promotional emails have a statement at the top that says 'This is a promotional email...'. 
You will still receive transactional emails (ie. password resets, certificates, updated certificate types of emails that are initiated because you actively interacted with the site).