Bulwark is an open-source webmail client for Stalwart Mail Server, built on the JMAP protocol. Self-hosted email, calendar, contacts, and file storage in one interface, free under the AGPL.

A self-hosted webmail client for Stalwart Mail Server, built with Next.js and the JMAP protocol.

Open-source mail and collaboration server with JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV and WebDAV support. Written in Rust, designed to be secure, scalable, and easy to operate.

Alternative pour mailcow ?