SnappyMail

SnappyMail is a web‑based email client that runs in modern browsers and is designed to be lightweight and fast. It is a self‑hosted, open‑source fork of RainLoop, requiring only PHP 7.4+ with the mbstring extension and no database, and it can be deployed via Docker or traditional PHP installations. The client emphasizes privacy by removing social‑login integrations and includes features such as dark mode, a built‑in HTML editor, advanced Sieve script support, and improved PGP handling.

The software targets individuals or organizations that want a simple, modern webmail interface without relying on external services or subscriptions. Its minimal download size (~138 KB with Brotli) and high Lighthouse performance scores make it suitable for mobile and low‑bandwidth environments. Administrators benefit from built‑in security measures like password hashing, syslog logging of failed logins, and optional Fail2Ban integration.

Distinctive aspects include a modernized codebase using ES2020, replacement of legacy JavaScript libraries with native browser APIs, and support for a wide range of IMAP RFC features, Kolab groupware, and encryption via Sodium and OpenSSL. The project is released under AGPL‑3.0 and is considered stable.