When we're on our computers, email notifications come up unless we're in DND (and even then, they show up whenever your email client is visible regardless).
For me, I have to open my email browser window to see new emails. No notifications. (And no client which I would set to 100% DND if I had one.)
DND should be default and there should be custom sounds for different contacts. Ofc its not our computer anymore, you are not in control. Still, its weird that our digital overlords didn't implement this. Is it copyrights? Are ringtone purchases such good money? I have no idea.
Fair enough! I don't think email threads are best for daily spousal communication, but perhaps for some people this could work. It sure would be easier to search than Apple Messages!
Damn, PREACH.
If it's urgent, the sender will call.
And, even then, unless I am on-call there should be no expectation that I am always available even during work hours.
IMO, no one should have have email that sends notifications.