I got the following errors when I performed a IMAPSYNC. Is that belonged to Zimbra or IMAPSYNC problem?
From Folder "Elana/Energy\\Utility News" : Could not select 646 NO SELECT failed
From Folder "INBOX/Fund Information/Operations/Trade\\Smart ticket" : Could not select 648 NO SELECT failed
From Folder "INBOX/Fund Information/Operations/Trade\\Smart ticket/Concentrated Fund" : Could not select 650 NO SELECT failed
Is it possible that these are folders that only contain subfolders?
The select would fail on any folder that doesn't contain messages.
The other thing is that the folder with the error is the "From" folder. Unless your source server is a Zimbra server (you don't say that it is), it can't be a Zimbra problem.