Out-of-Office Messages are a Security Risk →
Sometimes I’m really out of the office, though, crawling around in the backcountry wilderness or on an island somewhere. I’ll do it if I have to, but even then I don’t like setting an automatic response. There’s no way to do it that doesn’t leak information to a would-be attacker.
↬ https://lonesysadmin.net/2019/02/03/out-of-office-messages-are-a-security-risk/