How Companies Sell Your Email (and How to Prove It)
You signed up for one newsletter. Now you get 15 spam emails a day. Sound familiar? Here's how companies trade your data — and how to catch them.
The Data Broker Pipeline
When you share your email with a company, many sell it to data brokers — companies that aggregate and resell personal data. Your email can change hands 5-10 times within weeks, ending up in databases you've never heard of.
The Alias Trap Method
Give each service a unique alias: shein.k4x@mask.email for SHEIN, wish.m8p@mask.email for Wish. When spam arrives at your SHEIN alias from an unrelated sender, you have proof SHEIN shared your data.
Mask's Spam Forensics Dashboard
Mask tracks every email that arrives at each alias. The Forensics dashboard shows exactly which services receive unexpected mail — giving you evidence for GDPR deletion requests or simply disabling the leaking alias.