Subject: Out of Office
To whom it may concern,
I will be out of the office from (date leaving) to (date returning). During that time, I will have no access to email or voicemail. If your question or concern can wait until my return, I will respond to all messages no later than (deadline).
However, if you have an immediate need, please feel free to contact one of the following people in my absence:
For general departmental concerns:
(name)
(title)
(phone)
(email)
For questions regarding (specific project):
(name)
(title)
(phone)
(email)
I apologize for any inconvenience and look forward to assisting you upon my return.
Sincerely,
(your name)
(title)
(phone)
(email)