communal letterbox

apartment

apartment building, apartment house

post box or mailbox, especially a red public postbox / position, status, rank / pillar or column

gathering, assembly / an assortment / (mathematics) set

(chiefly women's speech) first person singular pronoun: I, me

gather, assemble, aggregate

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me