Main Features
25 GB
Drag-&-drop message management
Full support for MIME and HTML messages
Multiple sender identities
Full featured address book with groups and LDAP connectors
Threaded message listing
IDNA and SMTPUTF8 support
Spell checking
Canned response templates
IMAP folder management
Shared/global IMAP folders
Support for external SMTP server
Support for access control lists (ACL)
Built-in caching for fast mailbox access
Unlimited users and messages
Import/export functions
Template system for custom skins
Plug-in API for flexible extensions
Security
Sophisticated privacy protection
Brute-force login attack prevention
XSS attack protection
Support for PGP encryption
OAuth/XOauth login support

Main Features
30 GB
50 Mailbox
Drag-&-drop message management
Full support for MIME and HTML messages
Multiple sender identities
Full featured address book with groups and LDAP connectors
Threaded message listing
IDNA and SMTPUTF8 support
Spell checking
Canned response templates
IMAP folder management
Shared/global IMAP folders
Support for external SMTP server
Support for access control lists (ACL)
Built-in caching for fast mailbox access
Unlimited users and messages
Import/export functions
Template system for custom skins
Plug-in API for flexible extensions
Security
Sophisticated privacy protection
Brute-force login attack prevention
XSS attack protection
Support for PGP encryption
OAuth/XOauth login support

Main Features
100 GB
Unlimited Mailbox
Drag-&-drop message management
Full support for MIME and HTML messages
Multiple sender identities
Full featured address book with groups and LDAP connectors
Threaded message listing
IDNA and SMTPUTF8 support
Spell checking
Canned response templates
IMAP folder management
Shared/global IMAP folders
Support for external SMTP server
Support for access control lists (ACL)
Built-in caching for fast mailbox access
Unlimited users and messages
Import/export functions
Template system for custom skins
Plug-in API for flexible extensions
Security
Sophisticated privacy protection
Brute-force login attack prevention
XSS attack protection
Support for PGP encryption
OAuth/XOauth login support