Which ZDesktop release and IMAP service provider are you using?
From the log snippet it appears as though the failure is occurring while attempting to fetch message flags. Currently, this causes the entire folder sync to fail since this is not an expected error (UID FETCH shouldn't fail even for an invalid UID) but in the next release we will fall back to fetching flags one message at a time and skip the individual messages which fail (currently we do this while fetching message data). |