gashmicky do you mean you can't access the "Mail" page of the admin panel ? You might have to edit the mail_driver setting in your database to make the value lowercase (SMTP must be smtp for example).
If your driver setting is already lowercase there might be another javascript error. You can check the browser javascript console for an error message (in the developer tools of the browser).
I'm not sure what you mean by mail tables as there's no such thing in Flarum. Mail is controlled only via settings saved to the settings table. You mean the notification preferences table?
