What’s comes into the Unread Folder just seems to sit there after it’s been marked read even if I move it to another folder
Yes normally if you click on an email in the unread Favourites global folder and it changes to read status and then you go to another folder and back to the Unread folder, normally that email is then “only showing in the original folder” or whatever folder you moved it to.
So if it’s staying in the Unread folder constantly “even after its read”, then you may have a eg: database problem or a possible corrupted account or possibly a problem with your eM Client installation.
So if this has only just started happening and you have been making regular eM Client backups, then try restoring a recent dated backup when you know it was working ok via “Menu / File / Restore”. Any emails since the backup will then update when eM Client syncs.
However if you don’t have any recent backups or restoring a backup make no difference, then next suggest to try closing eM Client and manually running the repair on your database and see if that makes any difference. See @Gary post in the following thread how to manually repair the database for Windows and Mac
Note: Before running the repair make a manual backup via “Menu / Backup” incase you need to restore for any reason.
Now if manually repairing the database makes no difference, then next suggest if you have an IMAP, Exchange, Office 365, or iCloud account and nothing in Local Folders, go to “Menu / Accounts” and remove and readd your account and see if that fixes it. As might possibly be some sort of corruption in your account.
Note: Before removing and readding your account also suggest to make a manual backup via “Menu / Backup” incase you need to restore.
Next if removing and readding your account still makes no difference, then could be your eM Client installation has a problem. So suggest to next try uninstalling eM Client and if you have Windows “don’t delete the database” when asked on the uninstall wizard, and then reinstall the same or later version via either the release history page or Windows Store depending on where you originally installed eM Client from and if you have Windows or Mac.
Now if uninstalling and reinstalling makes no difference, then if you have a current active paid Pro or Personal version, then go to the VIP support page and login and lodge a support ticket.