Stalwart v1.0 is the first stable release of an open-source mail and collaboration server written in Rust, featuring support for JMAP, IMAP, POP3, SMTP, CalDAV, CardDAV, and WebDAV. The development team spent months optimizing performance using profiling, resulting in nearly 200 commits across 1,300+ files. The release also emphasizes data stability with a finalized database schema to eliminate disruptive migrations during upgrades.
Background
Stalwart is an open-source mail server project started in 2021 by Mauro D., initially as a Rust-based email parsing library before expanding into a full collaboration suite. The project has grown significantly over five years, positioning itself as a high-performance alternative to established mail servers.
- Source
- Lobsters
- Published
- Oct 27, 2026 at 12:28 AM
- Score
- 7.0 / 10