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.
Thanks for getting in touch. I am currently out of the office from [date] to [date] and will have limited access to my email during this time. You may be able to get ahold of me on my cell phone at [phone number]. If you can’t get through to me and have an urgent inquiry, you can contact a member of the team at [phone number], or my assistant [Name] at [email] or [phone number].

This is something I recommend doing only after you understand the dynamics of your workplace and your clientele. If it falls under the “okay” category, this unapologetically real out of office email can be a talking point when you return to your cubicle. It’s a short, simple, and sweet yet savage email. You can tweak the wording to write a bit of a diplomatic message based on your organization.
The answer lies in writing an effective out-of-office message to help reduce the interruptions. “Let key people know you’ll be gone before you leave,” says Ivan Misner, founder of the global business network BNI and author of Who’s In Your Room? The Secret to Creating Your Best Life. “That will help reduce your email. Then craft an out-of-office message for everyone else.”