Represents the audience of an email, and to whom it is visible both in the initial email and in online archives.
Emails that are only available in the archive and not sent to subscribers.
Emails sent specifically to subscribers who were previously premium but have since churned.
Free emails are sent out only to subscribers who are not paying for your newsletter (so you can send specific emails to convince them to pay, for instance!)
Premium emails are sent out to only paying subscribers (including those with gift subscriptions or on a free trial), and only premium subscribers can view them in online archives.
Private emails are sent out to all of your subscribers but are not viewable in your web archives.
Public emails are sent out to all of your subscribers and are available in your web archives.