Ugh, I wouldn’t mind changing daily if I could have a couple of prepared responses for normal circumstances (i.e.: “I’ve left for the day, but I’ll be back in the office tomorrow morning to return your call”) to select from, but having to create a new message for Tuesday night when the info for Monday night is the same? Rage inducing. Email is asynchronous, you KNOW you’re not going to get an instant reply and sometimes you email knowing fully well that it won’t be seen until the next morning/week/whatever. Why on earth mandate an auto-reply for that?
My husband’s voice mails says “…if you need immediate assistance call Mary at ####…”, only Mary retired something like eight years ago. I mention this to him every once in a while. It hasn’t changed.

In an instant, you feel a weight lifted from your shoulders, and a choir of angels sing Paul Kelly’s How to Make Gravy around you as you skip out of the office. You gaze upon the masses of workers on the tram, smugly wondering if their out-of-office responses are on yet.
It usually isn’t enough to just say you’re out and won’t be responding to messages. You’ve got to give people options for how they can get their issue or request resolved. One of the easiest wins here is to provide alternative contact information. That could mean providing your mobile number while you’re out, or, more commonly, providing the phone number and email of the colleague (or department) that will be covering while you’re away.