Roundcube Email Hosting — Feature-Rich Webmail Included

Roundcube is the most popular open-source webmail client in the world, used by millions of people and trusted by hosting providers, universities, and enterprises globally. Its interface is clean, intuitive, and familiar to anyone who has used a desktop email client. Unlike proprietary webmail services that track your behavior and inject advertisements, Roundcube runs entirely on your own server with no third-party tracking or data collection.

The responsive design adapts to any screen size, providing a comfortable experience on desktop monitors, laptops, tablets, and smartphones. You can access your email from any device with a web browser — no app installation required. This makes Roundcube ideal for situations where you need to check email from a shared or public computer without installing software or leaving traces.

Because Roundcube connects to your mailbox via IMAP, everything stays synchronized. Read messages in Roundcube and they appear read in Thunderbird. Move messages to folders in your desktop client and the changes appear in Roundcube. It is a seamless part of your email ecosystem, not a separate silo.

Roundcube's Enigma plugin provides PGP encryption directly in the webmail interface. Generate PGP keys, import contacts' public keys, and send and receive encrypted messages without leaving your browser. The encryption and decryption happen client-side using JavaScript, meaning your private key never leaves your browser session and is never accessible to the server.

Key management is straightforward: the Enigma plugin maintains your keyring within Roundcube, showing which contacts have public keys available and automatically encrypting replies to encrypted messages. You can import and export keys in standard formats for compatibility with other PGP implementations like GPG and Mailvelope.

For organizations that want PGP encryption across all users, keys can be distributed via WKD (Web Key Directory) hosted on your domain. This allows external contacts to automatically discover your public keys when sending encrypted email, removing the manual key exchange step that often discourages PGP adoption.

Roundcube includes a built-in Sieve filter management interface that lets you create server-side mail rules without editing configuration files. Rules can sort incoming mail into folders based on sender, subject, headers, or content; forward messages to other addresses; set flags and labels; send vacation auto-replies; and reject or discard unwanted mail.

Because Sieve rules execute on the server, they work regardless of how you access your email. A rule created in Roundcube applies to mail received while you are reading on your phone, checking via Thunderbird, or not connected at all. This ensures consistent mail organization across all your devices and access methods.

Additional Roundcube features include drag-and-drop attachment handling, rich-text and HTML message composition, contact management with CardDAV integration, folder management with IMAP SPECIAL-USE support, and a plugin ecosystem that extends functionality with calendars, task lists, notes, and more. The webmail interface is fully customizable through skins and configuration options.

Roundcube is pre-installed and pre-configured on every AnubizHost email hosting plan. Access it via https://mail.yourdomain.com (or a custom URL of your choice) with your email credentials. No additional setup is required — it works immediately after your server is provisioned and your domain's DNS records are configured.

For organizations that want a branded experience, Roundcube supports custom skins that can incorporate your company logo, color scheme, and custom CSS. We can apply your branding during server provisioning or you can customize it yourself through the skin system. Custom login pages, help text, and default settings are all configurable.

If you prefer a different webmail client, SOGo is available as an alternative with built-in calendar, contacts, and ActiveSync support for mobile device synchronization. Both options are included at no additional cost, and you can switch between them or run both simultaneously. Root access lets you install any other webmail software you prefer, such as Horde, Zimbra, or a custom solution.