Subscription : This column displays the subscription of the user. Each list will be represented by a colored circle (each list has its own colour so that you can easily identify it). A plain circle indicates the user is subscribed, a blank circle with a colored border an unsubscribed user, a hatched circle is a pending one (which means the user is still not confirmed). If there is no circle for a user, that means this user is neither subscribed, nor unsubscribed from the list. You can click on each circle in order to change the status of the subscription (if you click on a plain circle, the user will be unsubscribed from the list). This column was only available for our Business and Enterprise editions. We added it to our Starter and Essential editions since AcyMailing 1.6.0.