Your watch now gets BlueMail alerts the simplest way there is: it mirrors your phone's notifications, so anything you set up in BlueMail carries straight to your wrist with nothing extra to configure.
Because of that, BlueMail's per-account notification settings are all you need — set an account's sound, vibration or Do Not Disturb once and your watch follows. To choose which apps reach the watch at all, use your watch's companion app; see How Do I Turn Off BlueMail Notifications on My Smartwatch?.
