Part of me would really appreciate an OOO that says, “I can’t get back to you today because I’m out robbing a bank.” Part of me would dread that, because I’d probably become that person’s court-appointed attorney.
Your out-of-office message needs to set expectations around communication. First, provide information about when you’ll return. Misner suggests giving yourself an extra date to catch up.

Each time McClure makes an appearance in these out-of-office messages, he “speaks” on behalf of my colleague and alludes to the previous auto-responses in which he starred. It’s a mild form of self-deprecating humor — as if to say, “I know, I’m out of the office again” — made only funnier by the made-up teaser title included in the last line.
After I tweeted this example, dozens of people sent me examples of OOO messages they’d set or particularly good examples they’d seen in the wild. One example from a boss (via a TikTok) who offers emailers a decision tree of sorts. “Option 1.) Wait it out. Ask yourself, ‘is this urgent and important?’ If not, take a beat…you and I will be better off with this expectation set now,” the email begins. This one stands out because it’s extremely detailed, manages expectations and also offers who to contact in different situations. It models good behavior of taking time off, but also gives the original sender a variety of option. Most importantly, the responder forces the original sender to assess whether this is actually an urgent request.