Gmail's dot-ignoring feature led to API keys being issued to six strangers

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A developer discovered six accounts signed up overnight using Gmail addresses with dots inserted in different positions. Gmail treats addresses with and without dots in the local part as identical, which bypassed the system's uniqueness check. This resulted in six API keys being issued to six different real people who had never requested them. The incident highlights risks to email deliverability if recipients mark such emails as spam.

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