I just don't put work email on my personal devices. If I'm not at the office, I'm not working. Done. Otherwise you can pay me to be on-call, and that's a whole other discussion.
100% this. Last time I had work ask me to install slack or email on my personal device, I politely declined, but suggested they provide me with another mobile device specifically for that purpose. They didn't do that; but if they had done, I would have most likely kept it off of me after work hours.