My company just switched to a Zimbra mail server over the weekend I installed the Outlook connector and it was working pretty well until during a 5 hour flight I was able to sort through all the mail in my inbox and file it into the folders that I wanted. This was probably several megs of data. But in the end my inbox was empty. Then the next time I was online and opened Outlook, when Zimbra was done sycnonizing my inbox had several blank messages all dated 12/31/1969 and it did not download any new messages. I am still able to send email but the inbox is not working.