Feedback Loop
01 Definition
Feedback Loop meaning: A service that reports back to senders when recipients mark their email as spam.
A feedback loop, or FBL, is an arrangement where a mailbox provider notifies a sender each time a recipient marks their message as spam. Senders use these reports to remove complainers and identify problem campaigns. Registering for feedback loops with major providers is a standard part of managing complaints and protecting reputation.
Also called
Why it matters
How Feedback Loop fits the work
Feedback loops turn spam complaints into actionable data, letting you suppress unhappy recipients quickly before mounting complaints drag down your deliverability.
In context
The feedback loop flagged forty recipients who marked the promotion as spam, so the team removed them from all future sends.
Practical note
Always suppress anyone who generates an FBL complaint immediately, since continuing to mail people who reported you as spam is one of the fastest ways to ruin reputation.