Original message:                                      To: fred                   Hi.                   qmail-inject    Fill in the complete envelope and header:                        |             (envelope) from joe@heaven.af.mil to fred@heaven.af.mil     |             From: joe@heaven.af.mil     |             To: fred@heaven.af.mil     |                  |             Hi.     V                                qmail-queue     Store message safely on disk.                Trigger qmail-send.     |                  V                                qmail-send      Look at envelope recipient, fred@heaven.af.mil.     |          Is heaven.af.mil in locals? Yes.     |          Deliver locally to fred@heaven.af.mil.     V                             qmail-lspawn ./Mailbox                        |          Look at mailbox name, fred.     |          Is fred listed in qmail-users? No.     |          Is there a fred account? Yes.     |          Is fred's uid nonzero? Yes.     |          Is ~fred visible to the qmailp user? Yes.     |          Is ~fred owned by fred? Yes.     |          Give control of the message to fred.     |          Run qmail-local.     V                             qmail-local fred ~fred fred '' '' heaven.af.mil joe@heaven.af.mil ./Mailbox                                   Does ~fred/.qmail exist? No.                Write message to ./Mailbox in mbox format.