Depends on the system. Our Outlook is set up so that if you’ve got someone with an OOO in the “To” field, a note shows up saying that they are sending automated messages, and you can see the message. Convenient, since then I can add the person covering their stuff to the email without sending a second email.
Don’t know if those happen due to bad software, or a bad configuration decision, or just careless users, but those exhaust me.

I do this because my industry’s norm is that people check their email on vacation, at least once or twice, but I don’t do it. I don’t have work email on my phone so it’s technically true.
One may also ask, how do you write a holiday notice? Holiday Notice Letter Writing Tips Specify the duration of leave and name of the colleague who will handle your work responsibilities in your absence. Furnish contact details for any urgent requirement and mention your date of joining back work. 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. Include the date of your return. Let people know of any other individuals they can contact for help in your absence. If people typically contact you for a certain type of information or approval, let readers know how they can find the information or get the approval in your absence. How do you write a professional out of office message?