Tell your boss you check email three times a day, in the morning, after lunch, and before leaving work. And if she/he has something urgent to please slack you d

Tell your boss you check email three times a day, in the morning, after lunch, and before leaving work. And if she/he has something urgent to please slack you directly. If necessary create a filter that lets people add an #urgent tag to the subject that sends you a notification. Then turn off email and slack notifications for all but the rooms centered on things you are directly responsible for. Police those groups so they are only critical isssues that the whole team should be addressing. Create a second channel for casual discussion if need be. I don’t know... maybe none of these work but just try something. If you can’t change anything at least keep a log of all your interruptions and the general category of issue, so that you can talk about it with your boss in an informed way at your next 1 on 1.