one-time signup email 3

https://atomic-wiki.win/index.php/How_Short-Term_Email_Services_Protect_Your_Privacy_Online

A one-time signup email is that single message you get right after creating a new account, confirming your registration and often asking you to verify your email address. It's a quick, automated note that helps secure your account and makes sure you're a real person. You usually see a link inside to click, and once you do, you're all set to start using the service.