I had to explain to her that the email was still there, just like a voicemail, they’d get it on their return.
To keep the customers happy as they get frustrated when their experience isn’t personalized. Uphold customer expectations as maximum consumers expect personalized services from brands. Create brand evangelists as customers are likely to become repeat buyers of a brand that personalizes interactions. Examples & samples of automated messages (Text, Email)

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?
Remember, your email signature is as important to your company as all of your other corporate branding. Update any marketing promotional banners with seasonal offers. When the holiday season is over and your promos have finished, make sure you are no longer using a Christmas themed banner.