Unsubscriptions are the people that have unsubscribed for your mailings. They can do so via the unsubscribe link in the mail, or they could have complained via a mark as spam button that some e-mail clients have. You can also create an unsubscription your self when a customer calls you or when you have your own opt out system.

Object definition unsubscription

Property Type Description
ID Guid The ID of the unsubscription
AccountID Guid The accountID of the unsubscription
EmailAddress String The email address that unsubscribed
UnsubscriptionType Int (Enum) The unsubscription type
1 = Unsusbcribed, recipient clicked the unsubscribe link
2 = Complained, recipient complained, for example by clicking the "mark as spam" button
3 = Bounced, recipient address caused a permanent bounce, probably this email address doesn't exist.
CreatedOn DateTime When the address was created
ModifiedOn DateTime When the address was last modified