Perhaps someone reached out to your marketing department regarding a press inquiry, guest post pitch, etc. You’ll want to be sure you’re ready with a response. Thanks for reaching out to NAPA marketing, someone will be in touch with you shortly. What can we help you with?
Rather than sounding like a boring email robot, you could add a funny tone to your letter. Use a GIF or a meme to joke about what you’re doing on vacation, but remember not to go overboard.

I used to work with someone who had a message telling people she only checked her email twice a day. You pretty much needed to call her if you needed anything outside of those times. (She worked in a remote office.) I think she had read one of those books on efficiency that recommended scheduled email time. But there were problems with this: 4. My department often had to email attachments or text to illustrate our questions/concerns. And we were on deadlines. Reading a page of text over the phone was not an efficient use of anyone’s time 5. She did outreach & was often out of the office on site visits, trainings, or travel to these places, but never ever set her OOO for these, because she was “working.” However, she was effectively not available to read emails from other staff until after hours on those days.
I once worked somewhere that required an all-office email if you were going to be late, if you had an appointment, etc. I hated that. No one needed to know I was going to the dentist, but it was policy so I did it.