Security Bite: This old school alias trick will show you who’s selling or leaking your email

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In this week’s Security Bite, I’m taking it back over 20 years to the launch of Gmail in 2004–because that’s how long its little-known plus addressing (aliasing) feature has quietly existed. It was originally created to help with filtering and keeping inboxes tidy long before spam became what it is today. Google never really promoted it, so most people still don’t realize it’s a thing. But over the years, it’s become popular among privacy-minded folks to track which online services, subscriptions, etc., are selling email addresses to other companies or leaking them.

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Source: 9to5Mac