5. 5 The Friendly Professional. Season’s Greetings! Thanks for getting in touch. I’m out of the office enjoying the holidays until [date]. I’ll respond as quickly as I can when the festivities are over and I’m back at my desk.
Okay. So, it’s not to my exact personal tastes — to me, it’s overly wordy — but it’s probably fine for their culture and I’d be mildly amused if I got it. I see where you’re seeing condescension, but I think you can read it without that too.

According to American Express, “Six in ten customers feel that companies meet their service expectations”. Customers look for faster resolution and rely on the expectations that businesses set with queue time for evaluating their service quality.
Yeah, announcing you were going to delete emails unread and expecting the sender to resend when you return would NEVER fly in my office. I’d get executive complaints about that, especially if it went to a client or outside party – if a client can’t reach you, they will reach out to someone else who may not work at your organization and you lose business. I feel like this delete-it-all philosophy would only work for an entirely internal role where timelines are more relaxed, and even then, I feel it’s a bit unprofessional to foist your own catch-up work onto others, especially if they’ve been backfilling for you while you were OOO.