OOO Email
An out of the office email (or OOO email) is an automated message that is used to notify senders that the recipient is currently unavailable.
This is a typical response you get when emailing a prospect who is currently on vacation or sick leave – i.e., can’t check their inbox and won‘t be able to read your email any time soon.
Out of office email messages typically include info about a person you can contact instead or alternative communication channels to reach the prospect anyway. This makes OOO replies a valuable and important aspect of cold outreach.