What is the Zimbra Desktop Client?
Zimbra Desktop is an offline client similar to Microsoft Outlook but resembles the Zimbra Web Interface. It allows you to manage your various email accounts in one desktop tool. Zimbra mail, Yahoo! mail, Gmail, Outlook and any other work or personal email account using POP or IMAP is easy to set up in Zimbra Desktop. Each account is separately maintained.
After you set up your accounts, your email messages are downloaded to your computer and can be accessed whether you are connected to the Internet or not. Email messages in all your accounts can be read, replied to, forwarded and deleted from Zimbra Desktop. Mail storage is based on your computer's disk space, not on a pre-defined account quota
When you receive new email messages in any of your accounts, if you have Internet access, the message is automatically downloaded to your Zimbra Desktop. You do not need to open Desktop to make this happen. An envelope icon displays in the Windows Tray or in the Mac Dock row that shows the total number of unread messages across all of your accounts. Click the icon to open the desktop application.
Besides being able to access your different email accounts from one place, Zimbra Desktop also manages your contacts and has a calendar, task list application and a briefcase tool for storing your attachments.
To get started with Zimbra Desktop, follow this link to the Zimbra download site: http://www.zimbra.com/products/desktop.html
For a comprehensive Zimbra Desktop user guide: http://www.zimbra.com/desktop7/help/en_US/Zimbra_Mail_Help.htm#Getting_Started/Zimbra_User_Help.htm