Definitions for "Outbox"
Keywords:  outgoing, folder, inbox, outbound, sent
a folder which help us keep all the emails that have been sent
The outbox is the default folder where outgoing messages are stored until they are sent.
Place where the user's outbound email sits while the mail system is deciding whether to send it and, if so, to where (which will, of course, not include the destination intended by the user)
Keywords:  tray