This report shows how many recipients have asked to be removed from your address book(s) by clicking on the unsubscribe link in your email.
This also includes those recipients who have reached their bounce threshold (as set under Contacts > Suppressed Contacts).
These addresses are automatically removed from your address book(s) so that they cannot be mailed in the future. This would apply even if these email addresses were included in a future upload to the same or different address books. They would be automatically excluded from the upload. A complete list of all addresses removed can be found under Suppressed Contacts.
Drilling down on this report will display all the email addresses which have been unsubscribed.
Clicking on the DISPLAY button will show a drop down. You can change the order the emails are displayed in by using the Sort By drop down. You can also change the number of emails you see on a page by using the Page Size drop down.
Clicking on the Export drop down allows you to export the Unsubscribers as CSV.
To return to Reporting overview screen, use the More Reports drop down and click Campaign overview. The More Reports drop down displays a menu from which you can select the report type as shown below.