Roundcube

Roundcube is one of the most widely deployed open-source webmail clients on the internet, bundled by major hosting control panels and used by universities, ISPs, and self-hosters who want a clean, modern interface in front of their existing IMAP infrastructure. The project has been actively developed since 2005 and remains a reference implementation for browser-based email, balancing a familiar desktop-like experience with the flexibility of a fully open codebase.

Common Use Cases

Hosting providers and small businesses run Roundcube as the user-facing webmail for their existing mail servers, giving customers and staff a polished interface without licensing a commercial webmail product. Self-hosters who run their own mail stack (Postfix, Dovecot, or a turnkey mail server) pair Roundcube with that backend to get a clean, mobile-friendly inbox accessible from anywhere. Universities and non-profits provide Roundcube to staff and students as a reliable, translatable webmail front-end for institutional mailboxes, taking advantage of LDAP integration and per-user preferences. Privacy-conscious individuals point Roundcube at a paid IMAP provider to escape ad-driven webmail interfaces while keeping their existing mailbox.

Key Features

• Full IMAP and SMTP support for connecting to any standards-compliant mail server
• Responsive Elastic skin that adapts to desktop, tablet, and phone screens
• Drag-and-drop folder and message management with keyboard shortcuts
• Threaded conversation view with full-text and per-folder search
• Built-in address book with contact groups, vCard import/export, and LDAP support
• Plugin architecture for managesieve filters, two-factor authentication, calendars, and encryption
• Spell-check, HTML composer, and rich-text editing for outgoing messages
• Per-user preferences for language, timezone, signatures, and identity management
• Multi-identity support for sending from multiple addresses on the same account
• Translations in over 70 languages maintained by the community
• OAuth 2.0 and standard authentication mechanisms for modern mail providers
• Configurable via plain PHP files and environment variables for automation-friendly deployments

Why deploy Roundcube on Hostinger VPS

Deploying Roundcube on a Hostinger VPS gives you a private, always-available webmail interface for your existing IMAP mailbox without depending on third-party webmail providers. The VPS environment provides dedicated resources for fast message rendering and search even on large mailboxes, and the persistent PostgreSQL database keeps user preferences, address books, and saved searches consistent between sessions. Self-hosting Roundcube on your own infrastructure keeps webmail traffic on systems you control, lets you wire up custom plugins or skin tweaks, and integrates cleanly with the rest of your self-hosted stack — whether you run your own mail server or simply want a better front-end for an existing mailbox provider.