Description
Mail, calendar, contacts, and WebDAV services can be hosted from the prebuilt Stalwart server. The package installs `/usr/bin/stalwart`, default configuration under `/etc/stalwart-mail`, system users, tmpfiles rules, and `stalwart-mail.service`. It binds network services and stores mail data, so admin secrets, TLS, firewall rules, backups, and conflicts with other mail servers must be reviewed.