Hi. I just want to turn off notification bar notifications, not the sounds or badges. Make sense to you? Thanks so much.
Then you have to make the settings directly in your device's Android system:
-> Settings -> Notifications -> search and tap on AquaMail -> tap 'On the lock screen' and choose 'Don't show notifications at all'
... or turn off notifications (in general) for AquaMai by switching the toggle of the very first item ('Block all') to the right.