Definition
Complaint monitoring tracks how often recipients mark your mail as spam. Because complaint rate is one of the strongest reputation signals, high rates trigger throttling, filtering, and blacklisting.
Monitoring lets you react before damage is done, and acting on complaint data shows providers you manage abuse responsibly.
Complaint rate is one of the strongest reputation signals filters use, so monitoring it is essential. Feedback loops deliver the data needed to act quickly. Keeping the rate low and responding to spikes protects delivery.
How to Monitor Complaints
Feedback loops deliver complaint notifications so you can suppress the address and investigate the cause.
Track complaint rate as a percentage of delivered mail.
Why It Matters
Complaint rate is the strongest reputation signal filters use, so monitoring it is essential. Early detection of spikes prevents blocks before they happen.
Best Practices
- Use feedback loops to capture complaints.
- Keep the rate well under one per thousand.
- Investigate spikes and adjust targeting.
- Suppress complainers automatically.
- Review complaint trends monthly.
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Related Glossary Terms
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An abuse complaint is a report from a recipient who marks an email as spam, which negatively affects sender reputation and deliverability.
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Bounce management is the process of handling emails that are rejected by mailbox providers, including classification, removal of bad addresses and protection of sender reputation.
Frequently Asked Questions
A recipient marking your email as spam in their client. Complaint rate is one of the strongest reputation signals filters use, so monitoring it is essential.
Above roughly one per thousand sent is a concern. Feedback loops deliver the data needed to act quickly.
Send relevant mail and make unsubscribing easy. Keeping the rate low and responding to spikes protects delivery.
Feedback loops and provider abuse reporting. Complaint rate is one of the strongest reputation signals filters use, so monitoring it is essential.
Mail is filtered, throttled, or blocklisted. Feedback loops deliver the data needed to act quickly.