RainLoop/rainloop-webmail

Health v2 · maintenance only

Flags: archived

Adoption not part of the score

4118 stars · 1011 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

RainLoop Webmail is a simple, modern, and fast web-based email client written in PHP that connects directly to mail servers via IMAP and SMTP without storing mail locally. It requires no database, installs easily on any PHP-capable web server, and offers features like Sieve filters, OpenPGP, 2FA, and a plugin system.

Use cases

• self-host a webmail client for my IMAP/SMTP mail server
• give users browser access to email without a database backend
• deploy a lightweight webmail interface on a low-end VPS
• access multiple email accounts from one web interface
• support Sieve filters and vacation messages in a webmail UI
• add OpenPGP encryption and 2FA to web-based email

When to choose

• you need a database-free, low-resource webmail client for PHP hosting
• you want direct IMAP/SMTP access without mail stored on the web server
• you need Sieve, OpenPGP, or 2FA support in a self-hosted webmail
• you want simple installation and an admin panel for multi-domain setups

When to avoid

• you need actively developed software with ongoing security fixes - the project is in legacy/maintenance mode
• you prefer a Node.js or modern-stack webmail client
• you need calendar or contact sync features beyond basic contacts storage
• your server cannot run PHP 5.4+ with the required extensions

Facets

application · maturity maintenance

email http-server auth caching plugin-system email self-hosted web-development privacy php self-hosted cross-platform webmail imap smtp sieve openpgp two-factor-authentication no-database legacy web-server linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="RainLoop/rainloop-webmail")