I agree, though sometimes you are working at a particular time and need to get things out of your queue. The onus is on each person to switch off non-emergency

I agree, though sometimes you are working at a particular time and need to get things out of your queue. The onus is on each person to switch off non-emergency notifications out of hours and preserve their personal time. I also think it's crucial to never reply quickly to non-emergencies. Just creates the expectation you're available and encourage more of the same. That is, unless it's a situation/relationship you want to foster to establish yourself in a team, outpace someone for promotion, etc.