address
box
business
button
communicate
communication
communications
container
correspondence
delivery
design
email
envelope
flag
green
icon
inbox
incoming
letter
letterbox
mail
mailbox
mailing
message
news
open
outbox
outline
pobox
post
postage
postal
receive
receiver
recipient
roadside
send
service
shiny
shipping
sign
signal
stand
symbol
telegram
traditional
zip