MailCraft

A clean-room, open-source mail, calendar, contacts and tasks program in Rust with classic Outlook's layout. It runs natively on Windows, macOS and Linux and works with Microsoft 365, Outlook.com and IMAP accounts. It is private by construction: nothing in a message runs, nothing is fetched without the owner's say-so, there is no telemetry, and passwords and sign-ins live only in the operating system's credential store. Every command is scriptable through a CLI and an MCP server.