Would like to have a brief hints what the import setting do ? ( now is dimmed )
Thank you very much.
That same widget/dialog is used for all the import wizards. For import wizards where settings can be imported, the checkbox controls whether the settings will be imported or not. By "settings", they mean account settings like email address, server names and ports etc.
For the generic mbox import wizard, "import settings" is grayed out because the wizard doesn't deal with settings, just messages.