Use this method to get a report listing each contact that clicked the unsubscribe link in the email campaign activity to opt-out from receiving emails sent from your Constant Contact account. This report includes contact information, such as the contact's email address, unique ID, and the opt-out date and time. Opt-out report data is sorted with the most recent activity listed first. For more use case information, see Get an Email Opt-outs Report in the API guide.