I’m a software manager at present - honestly I just ignore email. I do get some emails from customers, but they’re supposed to be communicating through proper channels so their customer success managers need to at minimum be on cc. So if anything is important people can Slack me (including to say “check your email for…”), and if there’s an action needed, I’ll click the little bookmark to add the message to the “Later” section till the issue has been addressed. I won’t in any way claim that I’m well organized, but I am proud that I don’t need to spend more than 20 minutes a week on email, because I hate email.