Mailboxes
All kinds of mailboxes, odd ones, cute ones, animals ones, tractor ones and we will take painting of mailboxes. If it has a mailbox in the picture, they are very welcome.
Letter box, copper box, or other sturdy material compartment, or slot for incoming postal deliveries
Post box, a physical box for outgoing postal deliveries
Pillar box, post box in the United Kingdom, Ireland and Commonwealth of Nations countries
Pigeon-hole messagebox, e.g. a teacher's "mail box"
Email box
The Mailbox, retail complex in Birmingham, England
Message queue, a means of interprocess communication
Mailbox (app), a mobile email client