A list of individuals who have unsubscribed from future mailings is sometimes requested.
As an administrator of a mailing, you can download the list within the Dialog Manager under recipients (People who have left the mailing list).
It may happen that the list includes the same person multiple times. This is because a person may exist multiple times in the system with different background information. So when such a person unsubscribes, the list indicates that all versions of the person have unsubscribed.
Through integration with other systems, you can download the list to, for example, synchronize it with your CRM to ensure that recipients are not sent to Quicksearch or receive other mailings.