SimpleLogin, an email alias service from Proton, gives users a way to hide their real address by generating unique aliases for registrations, purchases, and correspondence. In a test using a Gmail account, the service forwarded incoming messages to the connected inbox and routed replies back through SimpleLogin, preserving the alias as the sender. The dashboard includes toggles to disable aliases, which stops mail sent to that address and helps manage unwanted correspondence.
The service is open source and can be self-hosted. Browser extensions for Chrome, Firefox, and Safari are available, along with iOS and Android apps. Account protection supports authenticator-based two-factor authentication and WebAuthn security keys. SimpleLogin's privacy policy notes that the service can access metadata such as sender and recipient addresses, subjects, and timestamps, and that incoming unencrypted messages are scanned for spam and viruses.
The free plan includes 10 aliases, one destination mailbox, and replies. Premium costs $4 per month or $36 per year, adding unlimited aliases, custom domains, multiple mailboxes, PGP encryption, and the ability to start emails from an alias. Using a different alias for each site limits exposure of a primary address in data breaches and makes it harder for services to link activity across websites. In testing, sending and receiving replies worked without issues, making SimpleLogin a practical addition to an existing inbox.