Introduction
	Roundcube is a browser-based email client — webmail — that lets you and your users read and send mail from any browser, with no desktop client to configure. It runs on your own VPS as a PHP application, talking to the IMAP and SMTP services from the mail server, and with its plugins it doubles as lightweight groupware: a shared address book, a calendar, and server-side mail filters. It works the same way on FreeBSD 15 and Rocky Linux 10. Set up Sendmail and Dovecot first; Roundcube is the friendly face in front of them.
	Installing Roundcube
	Roundcube needs PHP (see Web Applications) and a small database — SQLite is perfect for a single server. Install the package and a database driver: On FreeBSD 15: # pkg install roundcube php-sqlite3 # mkdir -p /var/db/roundcube && chown www:www /var/db/roundcube # cd /usr/local/www/roundcube && bin/initdb.sh --dir SQL On Rocky Linux 10 (from EPEL — see Installing Software): # dnf install roundcubemail php-pdo For a busier server you can back Roundcube with MariaDB instead of SQLite, loading its schema from the bundled SQL file.
	Configuring and Publishing
	Copy the sample configuration and point Roundcube at your IMAP and SMTP servers (localhost, since they run on the same VPS), then keep its database directory outside the web-served tree. Publish it at a tidy URL such as https://mail.example.com/ or https://example.com/webmail/ by adding a virtual host or an alias that points at Roundcube's directory. NOTE: Webmail handles passwords and private mail, so serve it only over HTTPS. Make sure the login page is never reachable over plain HTTP.
	Webmail as Groupware
	Out of the box Roundcube gives each user their mail and a personal address book. Its plugins extend it toward shared, collaborative use — the groupware features small teams most often want: Filters and vacation messages — the managesieve plugin, backed by Dovecot's Sieve support, lets each user sort incoming mail and set an out-of-office autoresponder from the browser. Address book — per-user contacts, with plugins available for shared or LDAP-backed directories. Calendar — an add-on calendar plugin provides scheduling for users who want it. For heavier collaboration needs (shared calendars and contacts synced to phones), a dedicated groupware stack such as SOGo can be installed as a separate application; for most VPS owners, Roundcube plus its plugins is the simplest path to webmail with a collaborative touch.
	Documentation
	Roundcube Documentation