rmail(1)
NAME
rmail − handle remote mail received via uucp
SYNTAX
rmail user...
DESCRIPTION
The rmail command interprets incoming mail received using uucp(1c) and collapses “From” lines in the form generated by binmail(1) into a single line of the form “return-path!sender”, and passes the processed mail on to sendmail(8).
The rmail command is explicitly designed for use with uucp and sendmail.