after so many years, thebat IMAP functionality is still weird. it's so hard to make it work at least somehow. folders are not synchronised, unless you manually clear the cache (which just does NOT clear with [x] Clear cached messages on exit).. What I found, in earlier versions, IMAP account STOPS working on second use. So when i close the account and reopen it, the synchronization starts, but in connection center window i see no activity, only the task, but no actions. I tried many builds, and 3.80.06 or less is the only one working. So i cant upgrade now, because without IMAP working this client is useless. The software is becomming buggy btw. So FEEEEW new functions over years introduced, but bugs they are:(