Bon voyage! You’re going on your holidays and you’re completely leaving the office behind. This is the perfect auto-response if you won’t be checking your emails the entire trip.
If your email client allows it, you could always just use an image to express your out-office sentiment, like this one. After all, they say that a picture is worth a thousand words — and visual content is still essential to successful marketing.

I find it rude, as well. If someone is emailing you (the royal you), it’s because they need something. Saying you’re just going to delete it without also giving that person a Plan B contact is totally rude. It sucks having to go through emails, it does. But it’s part of the job. In my role, I get requests from internal colleagues and from external partners. Even though I provide those partners with an alternate email to send their requests, it’s still my responsibility to make sure that the requests that were sent to me in my absence were handled. Saying “everything I’m sent will be deleted” just Would Not Fly in my industry.
2. Vacation Auto-Reply Email Giving Alternative Contact Person. [Your Greeting] I will be out of the office from ____ until ____. For immediate assistance please contact