Handle remote mail received via uucp
rmail [-D domain] [-T] user ...
Rmail interprets incoming mail received via uucp(1), collapsing ``From'' lines in the form generated by mail.local(8) into a single line of the form ``return-path!sender'', and passing the processed mail on to sendmail(8).
Rmail is explicitly designed for use with uucp and sendmail.
Use the specified domain instead of the default domain of ``UUCP''.
Turn on debugging.
The rmail program appeared in 4.2BSD.
Rmail should not reside in /bin.