Giving the option to contact an email address containing "interruptyourvacation" provides two things — 1) A dose of humor, and 2) discouragement from actually doing what the name suggests. Plus, he prefaces it with a request for empathy, by explaining that he promised quality time to his family.
An old boss had a pet peeve about this so I became very conscious of making sure that I listed out who to contact on what day… before the group email. So it looked something like this:

303-735-6245Voicemail system number: 5-6245 (5-MAIL) on-campus or 303-735-6245 off-campus. At the Main menu, press “4” for Setup Options, then press “1” for Greetings. Voicemail plays your current greeting. You can press # to skip hearing it. Follow the prompts to select the greeting that you want to change, then to make changes.
But I also believe there’s meaningful power in the mundane cultural norms we set and practice. Email, for better or worse, makes up a large chunk of how knowledge workers communicate. So much of this communication is muddled by broken email habits and larger anxieties around performing productivity. We’re constantly nervous about asking too much of others or doing too little on behalf of our coworkers. But we’re also stuck in work patterns that force us to communicate constantly and normalize working and demanding things from colleagues at all hours.