SimpleLogin is an open-source email alias service that lets you create aliases to protect your real inbox, forward mail, and reply or send from aliases using custom domains.

7k stars649 forksAGPL-3.0last commit Actively maintained

A Proton Pass feature that creates unique, disposable email aliases which forward to your real inbox. It masks your primary address, reduces spam, and centralizes alias creation, forwarding controls, and per-site alias management within Proton Pass.
SimpleLogin is an open-source email alias service that lets you create aliases to protect your real inbox, forward mail, and reply or send from aliases using custom domains.

7k stars649 forksAGPL-3.0last commit Actively maintained
Open-source anonymous email forwarding that creates and manages aliases, supports custom domains, encrypted forwarding, and self-hosting via Postfix and MariaDB.

4.8k stars267 forksAGPL-3.0last commit Actively maintained
Privacy-first, end-to-end encrypted password and email alias manager with passkeys, TOTP, apps and extensions, plus a built-in email server for self-hosting.

3.1k stars104 forksAGPL-3.0last commit Actively maintained
OpenTrashmail is a standalone disposable email (“trashmail”) service with its own SMTP server, offering a web UI plus JSON API, RSS feeds, and webhooks for received mail.
924 stars75 forksApache-2.0last commit Slowing down
Self-hosted disposable email server for creating temporary addresses to reduce spam and protect privacy, with an optional TLS setup and a web UI.
713 stars55 forkslast commit Actively maintained
Inboxen provides unlimited unique email inboxes to protect your primary address from spam, sign-ups, and tracking while keeping your real inbox clean.

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Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 4 of 6 shipped a commit in the last six months. Licences in this list: AGPL-3.0, Apache-2.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Email Servers (SMTP/IMAP).