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 will be out of the office starting (Starting Date) through (End Date) returning(Date of Return). If you need immediate assistance during my absence, please contact (Contacts Name) at (Contacts Email Address). Otherwise I will respond to your emails as soon as possible upon my return. Thank you for your message. How do you respond to holiday greetings? "And (also) to you!" You too! Thanks, same to you! Happy New Year to you and yours (when you want to extend the wishes to the other person's family) How do you let clients know you are going on vacation?

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If you’re taking a vacation and staying home, your clients or coworkers may still expect you to pop into the office and answer their email. Use this autoresponder to let them know you’re really not available — even if you’re bumming around on the couch.