If you have critical projects that can’t wait until you return, offer a communication option like text messages, suggests Reeves. “I have found, to my delight, that people really are judicious about texting you while on vacation,” he says, with one caveat. “Don’t put your mobile number in the away message. That way, only people who have your mobile number can text you. And those are the ones you care most about.”
If you're using Mail, you may be surprised to learn that there are no settings or preferences that can enable you to setup an auto-reply like you would on a corporate email system. And there are no preferences for it on iCloud either (hint hint, Apple). The only thing you can do to get around this problem is to setup an Auto Reply rule in Mail. And that's what we're going to show you how to do.

This is true! The nuclear option also helps the recently returned vacationer understand what is a priority and what isn’t. But, as boyd wrote, “if you just turn off your email with no warning, you're bound to piss off your friends, family, colleagues, and clients.” The blog post offers some helpful steps to make a clean break feasible — they include communicating with colleagues about the sabbatical long in advance, managing expectations of those who rely on you, creating a backdoor for true emergencies, and then, right before going away, reminding everyone about the sabbatical once again.
I mean, sometimes I put up an OOO because I’m on vacation and not checking email. Sometimes I put one up because I’m travelling for work and will only have sporadic access to my laptop, but might get to check once or twice a day. In my role, it’s important to make that distinction. Maybe it’s not so important for other people.