This is what I’ve seen most often in my career. Problem is, the contact is almost always the admin. I’m the admin. Everyone’s idea of assistance is different. Often, I didn’t have the knowledge about the issue in order to be of any assistance. I wound up spending more time running around looking for answers than actually working on what was on my own plate. It’s exhausting. Otherwise known as “please don’t call us for unicorn problems when we handle llamas. Literally, we can’t do anything for unicorn problems.”
If you are checking emails while you’re out and are responding slower than normal, state that, suggests Jill Gugino Panté, director of the Lerner Career Services Center at the University of Delaware. “If you don’t have access to email and can’t return messages, state that as well,” she says. “The clearer you are in your messaging, the better.”

To my mind, it’s just a really bad idea to mass delete stuff that comes in while you’re out. You never know if those emails contain important (though non-actionable) information that you’ll need. You really can’t expect people to resend information like that once you’re back, especially if you were cc’d on something.
Example Sentences for Step 1. All company offices will be closed for the New Year's holiday at 3:00 p.m. on Thursday, December 31, and will remain closed until Monday, January 4. Warmest holiday wishes to you all! The fourth of July is on Sunday this year, so we will take our day off on Monday, July 5. Have a great weekend!