AnonAddy

Addy.io is a free, open-source anonymous email forwarding service that allows you to create unlimited email aliases to protect your real email address from spam. With addy.io, you can create aliases on the fly or generate them beforehand, and manage them from a dashboard. The service also offers features like anonymous replies, custom domains, GPG/OpenPGP encryption, and mobile apps. You can use addy.io to compartmentalize your aliases, add multiple recipients per alias, and even access the service via an API. The service offers different pricing plans, including a free plan with unlimited standard aliases and 10 active shared domain aliases, as well as paid plans with additional features like priority support and unlimited monthly bandwidth.