Get notified when someone unsubscribes from newsletter

[spirelli]

I assume that if someone unsubscribes from the newsletter, the email address/entry gets permanently deleted from the database, correct?

I need for Contao (2.11) to send a notification email when someone unsubscribes so that the email address can also be manually removed from another database. How would this best be done?

[Andreas]

There is the notification_center. But unfortunatly its for Contao 3.