When you are working offline, only the items that are in the ZDB that are on your computer are
available. If you configured the settings to download headers only, only the messages that you have
downloaded are available.
New mail is not synchronized to your computer until you go online and connect to the Zimbra server.
Email that you create while working offline is saved to your Outbox and is automatically sent when
you connect to the Zimbra server.
New iOS & Android Touch Client
A new touch client is available for tablets and smartphones: This secure, HTML5 mobile web application provides a device-specific user experience for Android and iOS devices.