You cannot be sure how quickly your colleagues will respond to messages when you are absent, so avoid promising any instant assistance. Moreover, ensure you take permission from your co-workers before giving their details in the message. They might be too busy to substitute.
While I won’t be quite as far as the North Pole, I will still be completely disconnected from my inbox until my return. So, if you require immediate assistance, please send your email to [contact name] at [contact email].

Usually, people take leave for vacation, business traveling, maternity leave, or sickness. Additionally, sometimes employees who will no longer work in a company also need to provide an out-of-office message for their customers, especially if they are in a high-level management position working closely with those customers.
“The world is serious enough as it is - people need, and usually appreciate, an unexpected moment of levity in their day,” he says, when quizzed about how recipients might respond to such an OOO. He also confides that he himself has dispensed with auto responses altogether – though not for idealistic reasons. “The last time I tried to set one up, I botched it so badly that somehow it resent every single email in my outbox from the previous year - client emails, firing notices, literally thousands of emails.”