What’s an acceptable complaint rate by provider?
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The 2024 bulk sender requirements from Gmail and Yahoo Mail set the clearest public thresholds we have.
Gmail's thresholds (measured in Google Postmaster Tools):
- Below 0.10%: safe territory. Keep it here.
- 0.10% to 0.30%: warning zone. Gmail will start filtering more of your mail.
- Above 0.30%: serious deliverability impact. Sustained rates here can lead to blocking.
Yahoo Mail's thresholds: Yahoo has aligned closely with Gmail's 0.10% and 0.30% benchmarks. Stay below 0.10% for both.
These thresholds are measured per sending domain, not per campaign. A single poorly targeted campaign can spike your rolling average into the warning zone and take weeks of good sending to recover from.
One practical note: complaint rates in your ESP dashboard often differ from what Google Postmaster Tools reports. ESP dashboards show only complaints that reach you via feedback loops. Google Postmaster Tools shows the actual spam button press rate inside Gmail, which is more complete and more accurate.
If your complaint rate is trending up, list quality is usually the first thing to check. Common causes: sending to purchased or old lists, skipping double opt-in, and sending too frequently to unengaged subscribers. Our free Blocklist Checker won't show complaint rates directly, but if complaints are high, a blocklist listing usually follows soon after.
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