Professional support We're always here to help you quickly resolve issues and keep things up to date.

Guaranteed responses and prompt bug fixes for your peace of mind.

Plugin framework and API for seamless integration A set of developer tools lets you extend the application in many ways, including user interface adjustments, Single-Sign-On, and more.

Mobile sync for Mail, Contacts, and Calendar Let your users keep their data in sync with IMAP, CardDAV and CalDAV support. iPhone and iPad can get sync settings automatically.

Mobile layout Besides mobile apps, there is another option to work with e-mail on smartphones - a web UI optimized for small screens and touch input.

OpenPGP Encrypt, sign, decrypt and verify e-mails right in the browser. All the crypto takes place directly in the browser, neither PGP keys nor decrypted data are sent to the server.

Paranoid Encryption A strong AES-256 browser-based encryption in Files module. When enabled, encryption process occurs right in the browser, the server never has access to unencrypted data or encryption keys.