Level: Advanced
Feedback loops let major mailbox providers notify senders directly when a recipient marks their mail as spam, giving senders visibility they otherwise wouldn't have into real-time complaint behavior.
FBLs Provide Direct Complaint Notifications
When a recipient at a participating provider clicks "report spam," the sender receives a notification through the feedback loop, rather than that signal remaining entirely invisible to them.
Registration Is Required and Provider-Specific
Each major mailbox provider offering feedback loops has its own registration process, and coverage varies, meaning FBL visibility is never complete across every possible recipient provider.
Complaints Received via FBL Should Trigger Immediate Suppression
A recipient who's marked a message as spam should be suppressed from future sends immediately, since continuing to send to them virtually guarantees repeated complaints and further reputation damage.
Next step: Use the SeoWolf's Notepad to document your feedback loop registrations and your process for handling incoming complaint notifications.