Zimbra Enterprise Email

Basic Plan

1GB Mailbox
POP/IMAP
Custom Domain Integration
Personal Contacts
SSL Security

Enterprise Plan

50GB Mailbox
POP/IMAP/MAPI
Custom Domain Integration
Shared Contacts, Calendar & Tasks
SSL Security
Personal/Group Brief Case
Public Folders
ActiveSync/Push
Archiving & Discovery
Legal Hold
Custom Retention Policies
Mobile Device Management

Premium Plan

25GB Mailbox
POP/IMAP/MAPI
Custom Domain Integration
Shared Contacts, Calendar & Tasks
SSL Security
Personal/Group Brief Case
Public Folders
ActiveSync/Push

Standard Plan

5GB Mailbox
POP/IMAP
Custom Domain Integration
Shared Contacts, Calendar
SSL Security