RoundCube Webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.

RoundCube Webmail is written in PHP and requires a MySQL or Postgres database. The user interface is fully skinnable using XHTML and CSS 2.

Features

• Multilingual capabilities
• Full support for MIME and HTML messages
• Compose messages with attachments
• Multiple sender identities
• Basic address book
• Find-as-you-type address book integration
• Forwarding messages with attachments
• Create or remove custom message folders
• Built-in caching for fast mailbox access
• Support for external SMTP server
• Searching messages and contacts
• Spell checking
• Advanced user interface
• Unlimited users and messages
• Complete customization with skins