What’s Yahoo’s complaint tolerance?

Yahoo's complaint tolerance sits at the same threshold as Gmail: below 0.3% maximum, with a target of under 0.1%. Exceeding 0.3% triggers aggressive filtering and potential blocking. Yahoo measures complaints through their feedback loop, which reports spam button clicks from recipients.

The practical impact of complaints at Yahoo can be more severe because their systems respond more aggressively to threshold violations. While Gmail might gradually increase filtering, Yahoo may switch to blocking more abruptly when thresholds are exceeded.

Yahoo calculates complaint rates as a percentage of delivered mail, not sent mail. This means messages that bounce or get rejected are not included in the denominator. Monitoring your Yahoo specific complaint rate through their feedback loop helps catch problems before they trigger enforcement.

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