This issue is a bug that I know for about more then 5 years.
When I close my mail client, for some reason, the client still hangs when you close it with the dialog box 'Processing IMAP folders' in the queue.
There is no time out for this or it looks like you can not disable that 'maintenance' feature.
When I close my mail client, for some reason, the client still hangs when you close it with the dialog box 'Processing IMAP folders' in the queue.
There is no time out for this or it looks like you can not disable that 'maintenance' feature.