i’m a zimbra fan and use it on a daily basis for my personal websites and my consulting business. i love the fact that they brought their web client to the desktop and that you can create and send emails while offline. one issues i had when installing the zimbra desktop client, was on reboot of the system i would get an error stating
the connection was refused when attempting to contact localhost:7633
i did a search and found out that it was caused by the zimbra service not starting upon login. to fix this, you simply need to add the following command to the session manager in system > preferences
/home/<user>/zimbra/zdesktop/zdesktop start
or
/home/<user>/zdesktop/zdesktop start
and thats it. you can download zimbra desktop from here.