選択的
address
advertising
african
american
bills
black
box
bulk
closeup
collection
communication
contact
container
copy
correspondence
delivery
direct
document
drop
envelop
envelope
hand
holding
information
letter
mail
mailbox
marketing
metallic
one
open
outdoors
paper
parcel
person
personal
post
postage
postal
postcard
postman
private
recipient
remove
retrieve
send
service
unread
yellow