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AI Spam Filters Allegedly Block Legitimate Emails Based on Biased Keyword Detection

AlgorithmWatch tested spam filtering algorithms across Gmail, Yahoo, Outlook, GMX, and LaPoste. Their findings reportedly showed that Microsoft Outlook’s spam filter flagged emails based on specific keywords that led to racial and content-based biases blocking legitimate communications. Emails mentioning Nigeria or containing certain financial and sexual health terms were found to be disproportionately marked as spam.

Date it happened
2020-10-22
Organisation involved
Yahoo, Outlook, LaPoste, GMX, Gmail
Product, system or model
Yahoo! Mail's spam filter, SpamAssassin, Microsoft Outlook's spam filter, LaPoste Mail's spam filter, GMX Mail's spam filter, Gmail's spam filter
Where this came from
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Attribution

This incident was imported from AI Incident Database and is used under CC BY-SA 4.0. Our additions to it — the structured fields, the translation, the checks against other reports — are published under the same licence.

This is a record of what was reported, not a finding that anyone broke the law. If it names your organisation and you believe it is wrong, the corrections process is free and open to everyone.