Use this endpoint to retrieve a list of contacts that unsubscribed (opted-out) from a SENT email campaign.
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Privileges required: contacts:read
Retrieve a list of contacts that unsubscribed from an email campaign specified by the
campaignId path parameter. Use the
created_since query parameter to retrieve only the contacts that unsubscribed on or after the date/time specified. This is useful for sync'ing tracking data across applications.
NOTE: Tracking information is only available for SENT email campaigns.