Let LearnDash students opt-in to Mailchimp lists and tag them by course.
LearnDash – Mailchimp
No need to make this complicated. All that is necessary to start subscribing students is to enter a valid Mailchimp API key, select the correct MailChimp list and create your segments with one click! If you chose not to enable Auto-Subscription, then once the student opts-in you are all set.
Display subscription form to enrolling students
When enabled for a course, a prompt to subscribe to your newsletter will display during course registration for new students. The student must select yes to enter the automation workflow. If Auto-Subscription is enabled, then this opt-in will not show.