mailroom
nounUK /ˈmeɪl.ruːm/
US /ˈmeɪl.ruːm/
A room where letters and packages are sorted and sent out.
The mailroom is busy every morning with letters and boxes.
OTHER MEANINGS
2. A place in a company where incoming mail is received and given to workers.
She picked up her package from the mailroom.
3. A room in a school or building where mail is sorted for people who live or work there.
The dorm mailroom closes at six.
4. The department that handles mail for an organization.
He works in the mailroom of a big office.