This is a not-very-serious-but-still-annoying bug. I'm running ElectronMail 5.0.1 on Linux Mint Mate 20.3. As you can see in the attached screenshot, there is a 2 to the right of "All mail" in the folder menu on the left, ostensibly indicating 2 unread messages. But this is spurious. There are no unread messages in any of my folders. Even when I click the "unread" filter in "All mail" itself, nothing shows up. These spurious unread message numbers show up next to various folders regularly. I can't clear them, even by logging out and in again. And the ElectronMail tray icon shows spurious unread message numbers as well.
