If something is urgent they should call me. Messages depend on the person. But emails are well within the category of reading whenever I have time, every other

If something is urgent they should call me. Messages depend on the person. But emails are well within the category of reading whenever I have time, every other day or so. If people's devices beep every time anyone sends them an email, that's their choice. Which is not to say that a priority indication can't be helpful. Telegram has "send without sound" as an option if you long press the message button, which I use at night with my mom because I know she usually leaves sound on 24/7 (apparently other, "normal" people don't message after midnight!). Email has this system too but the other way around (priority flag) and I've received about a dozen high-priority emails, mostly while interning at a bigcorp. They could literally all have been deleted unseen. People set the flag when they think you'll otherwise not read it, it's that level of useless. There's also a low-priority flag that I've seen used maybe once ever. You could start using that if you're worried someone has standard emails set to audio notifications.