A mailroom (US) or post room (UK) is a room in which incoming and outgoing mail is processed and sorted. Mailrooms are commonly found in schools, offices, apartment buildings, and the generic post office. A person who works in a mailroom is known as a mailroom clerk or mailboy and the head person (sometimes the only person) is called the postmaster. The mailroom is responsible for a company's incoming and outgoing mail. A mailroom clerk prepares outgoing mail and packages prior to their being sent out via the post office or other carrier.