6.3 Feedback Loop Server
The Feedback loop servers help in monitoring the abuse reports that subscribers do and take proper action when it finds such reports.
Every time when the spam button is pressed by one of your subscribers, the email provider the subscriber belongs to, will send a notification related to that event. In order to receive such notifications, you should subscribe for such notifications at the email provider.
In order for DooxMail to process these notifications, you need to add email addresses.