heirloom-mailx -VERSION (return code: 0)
v14.8.16
heirloom-mailx --help (return code: 0)
Synopsis:
heirloom-mailx -h | --help
heirloom-mailx [-BDdEFintv~] [-A account]
[-a attachment] [-b bcc-address] [-c cc-address]
[-q file] [-r from-address] [-S var[=value]...]
[-s subject] [-X cmd] [-.] to-address... [-- mta-option...]
heirloom-mailx [-BDdEeHiNnRv~#] [-A account]
[-L spec-list] [-r from-address] [-S var[=value]...]
[-X cmd] -f [file] [-- mta-option...]
heirloom-mailx [-BDdEeHiNnRv~#] [-A account]
[-L spec-list] [-r from-address] [-S var[=value]...]
[-u user] [-X cmd] [-- mta-option...]