Ubuntu Geek posted a guide about setting up mbra Desktop on Ubuntu 10.10 (Maverick)

Zimbra Desktop is the next-generation email and collaboration client.The free Zimbra Desktop client allows you to meld the online and offline worlds ? storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road.

  How to install Zimbra Desktop on Ubuntu 10.10 (Maverick)