
1) Letter getter 2) Proverbial first job locale 3) Rooms
Found on
https://www.crosswordclues.com/clue/mailroom

A mailroom 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. Th...
Found on
http://en.wikipedia.org/wiki/Mailroom
No exact match found.