address
background
black
box
brick
brown
city
closed
communication
contact
container
correspondence
day
deliver
delivery
design
entrance
fence
information
keyhole
letter
letterbox
letters
lock
mail
mailbox
mailing
message
metal
newspaper
nobody
object
outdoor
outdoors
outside
post
postal
postbox
private
receive
receiving
send
service
steel
street
style
stylish