Stalwart is an all-in-one mail and collaboration server that implements IMAP, JMAP, SMTP, POP3, CalDAV, CardDAV, and WebDAV protocols.
The tool addresses the need for a unified messaging and collaboration platform by consolidating email, calendar, and contact management into a single server implementation. It handles mail delivery and retrieval across multiple protocols, calendar synchronization, contact management, and file sharing through WebDAV, all within one codebase written in Rust to prioritize security and performance.
Organizations seeking to self-host their communication infrastructure should consider this tool if they need comprehensive protocol support without managing separate services for mail, calendaring, and contacts. It suits deployments where security and scalability matter and where operators prefer a single Rust-based system over assembling multiple specialized servers. The project's breadth of protocol support distinguishes it from mail servers that focus primarily on IMAP and SMTP alone.
The project maintains active continuous integration workflows. Development activity shows consistent engagement with the codebase and community presence across multiple platforms. The tool receives ongoing maintenance and updates to its core functionality.
