Email Tag Autofill

Sarah signed up for an online fitness app using sarah+FITPRO@gmail.com. Three months later, she started receiving sketchy weight-loss spam emails - but they were all addressed to sarah+FITPRO@gmail.com. She immediately knew: 1. FitPro leaked or sold her email - no other company had that specific address 2. She could block it surgically - created a Gmail filter to auto-delete anything sent to that tag 3. She reported the breach - contacted FitPro with proof they compromised her data 4. Her main email stayed clean - the spam never touched her real address Without email tagging, Sarah would have had no idea which of the 50+ services she uses leaked her email. She might have blamed the wrong company, or worse, assumed her email was "just out there" with no way to stop it.