About
Stalwart Labs develops a mail and collaboration server written in Rust. The platform combines message transport and storage with calendars, contacts, shared files, spam filtering and phishing controls. It supports JMAP, IMAP, POP3 and SMTP, together with CalDAV, CardDAV and WebDAV for existing clients.
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Administrators can run one server or a cluster and choose from documented storage and integration options. Security features include automatic TLS certificates, domain authentication and transport-policy checks. Mailbox encryption can use S/MIME or OpenPGP credentials. The documentation provides installation routes for Linux, macOS, Windows and Docker.
Community and Enterprise editions are available. Enterprise subscriptions count user and group mailboxes, with aliases and mailing lists excluded from billing, and licence keys can cover multiple servers under the licensed hostname domain. A 30-day Enterprise trial is offered. Premium support begins at 150 mailboxes; smaller subscriptions rely on community support unless another arrangement is agreed.
Stalwart can use an existing LDAP, OpenID Connect or SQL identity source, and provides full-text search in 17 languages with optional external search backends.
