You can then come up with a subject and write your text, explaining that you are out of office or unavailable.
The example above (which comes from NY Times) may not take advantage of some of the tips we mentioned, but it’s great because it’s so short. Due to its absent-minded straightforwardness, such a message can be perceived as a real, non-automated reply — as if you were so busy that you only carved out a few seconds to type these five words.

Now make your email unique when you are out for traveling for work and be a standard part of the job. If you are traveling to a conference you can set up your email.
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.