Definition
A service from a mailbox provider that tells senders when recipients mark mail as spam, so those addresses can be suppressed.
Glossary
Feedback loop
A service from a mailbox provider that tells senders when recipients mark mail as spam, so those addresses can be suppressed.
Related terms
- Spam complaint rateThe percentage of recipients who mark your email as spam. Providers cap this very low, often around 0.1 to 0.3 percent, and exceeding it harms deliverability quickly.
- Suppression listA list of addresses you must never email again, such as hard bounces, complainers and unsubscribes. Honouring it protects reputation and compliance.
- Sender reputationA score mailbox providers assign to a sender based on past behaviour. Strong reputation lands you in the inbox; poor reputation sends you to spam.
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