cmail -V (return code: -15)
cmail (From XBoard version 4.8.0), Copyright (C) 1993 Free Software Foundation, Inc.
cmail comes with ABSOLUTELY NO WARRANTY; for details type `cmail -w'.
cmail is free software, and you are welcome to redistribute it
under certain conditions; type `cmail -c' for details.
Game name [<cr> to use default]:
cmail -h (return code: 255)
Usage: cmail
[-h] [-c] [-w] [-[x]v] [-[x]mail] [-[x]xboard] [-[x]reuse] [-remail]
[-game <name>] [-(w|b|)games <number>] [-(me|opp) <short name>]
[-(w|b|my|opp)name <full name>] [-(w|b|my|opp)na <email>]
[-dir <directory>] [-arcdir <directory>] [-mailprog <mail program>]
[-logFile <file>] [-event <event>] [-site <site>] [-round <round>]
[-mode <mode>]