Just started using Zimbra Desktop with AOL mail and also with a pop3 provider.
On AOL, messages that I send are not being saved in the sent folder, even though I have that option checked in preferences. I looked in the log and saw no errors.
On the pop3 account, it does save sent messages.
As a note, if I go to my Webmail client for AOL, it does save a copy in the saved mail folder--and when I sync with Zimbra, it appears in the sent folder.
(the messages I sent from Zimbra also do not appear in the online sent folder--as expected).