We've all been there: a website forces you to register just to read one article or download a PDF. So you search for "temporary email," click the first link, use the address, and move on. But have you ever stopped to think about who owns that "temporary" address? Most people use these services for privacy, but most of these services are actually Privacy Theater . Here is why, and how we should be building them instead. 1. The Proxy Problem The majority of top-ranking temp mail sites don't actually run an email server. They use APIs from commercial providers like Mailgun, SendGrid, or AWS SES. When an email arrives at your "private" temporary address, it first lands on the servers of a multi-billion dollar corporation. They parse it, log it, and likely use it for their own internal telemetry. Only then is it forwarded to the temp mail site's frontend.…