MailCraft

An open-source mail, calendar, contacts and tasks program, written from scratch in Rust.

MailCraft is a clean-room reimplementation of the mail client people already know how to use: the ribbon, the folder pane, the message list with its reading pane, conversations, flags, categories, rules, a calendar with recurring meetings, people and to-dos. It is a native, GPU-rendered app (no Electron, no web view), it also runs in a browser tab through WebAssembly, and every action in it is a command that scripts and AI agents can run too.

Status: public beta (0.8). For Microsoft accounts (personal, or work or school) on Windows, macOS and Linux, kept in step with Outlook on the web; keep Outlook to hand while you try it. A lot of what a daily driver needs is still to come. See ROADMAP.md and docs/gaps.md for an honest list.

MailCraft follows the architecture and conventions of WordCraft and the other Craft apps: the same layered crates, the same “everything is a command” engine, the same…