You must pay close attention to signs of negative language or tendencies to sound monotonous. Instead, you can use simple, everyday vocabulary to convey your message.
The marketing tactics of businesses should be focused on customizing the client experience to make each interaction meaningful and valuable. Personalizing your automated replies makes your customers feel good (if you do it right) because it helps you say something that’s actually helpful and targeted.

Q. Who should notify contractors, vendors and other individuals who work with various University departments that their services may not be needed during winter break?
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.