envelope

U+2709

japanese post office

U+1F3E3

european post office

U+1F3E4

outbox tray

U+1F4E4

inbox tray

U+1F4E5

package

U+1F4E6

e-mail symbol

U+1F4E7

incoming envelope

U+1F4E8

envelope with downwards arrow above

U+1F4E9

open mailbox with lowered flag

U+1F4ED

postbox

U+1F4EE

postal horn

U+1F4EF