Vacation/Out-of-Office Auto-Reply Messages: It’s important to create an email message out of office autoresponder when you are taking a vacation or going to be out of office for a few days. It’s a perfect way to communicate anticipated delays to your clients and customers and it serves a practical function and if you’re doing it right it could contribute to your company expanding.
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?

You’ll have options to set a “first day” and “last day,” or just “first day.” If you want things truly automated, picking a “last day” will trigger the autoresponder to automatically turn itself off the day after the selected date. Of course, in those instances when you’re unsure of your exact return date, it’s best to leave this open-ended. The “out of office” subject line is much less creative and scientific than say, a cold email subject line or a marketing email subject line. More often than not, they’re very plain and simple, like the following:
I include my boss because I have different backups for five or six different parts of my job, and my boss is more likely to know the nuances of which one is the appropriate contact than the person sending the email, so it’s more likely to get to the right person if she redirects than if the emailer tries to guess which one of the six contacts I listed is the one who can solve their problem. (My specialty is the “other things as requested” section of my job description; I’m sort of a jack of all trades around here. :) )