Features:
- Drag-and-drop message management
- Full support for MIME and HTML messages
- Multiple sender identities
- Full featured address book with groups and LDAP connectors
- Find-as-you-type address book integration
- Threaded message listing
- IDNA and SMTPUTF8 support
- Spell checking
- Responsive skin (multi-device support)
- Shared/global IMAP folders
- Support for access control lists (ACL)
- Built-in caching for fast mailbox access
- Unlimited users and messages
- Import/export functions
- Plug-in API for flexible extensions
- XSS attack protection
- Support for PGP encryption
