http://www.fmi.uni-passau.de/archive/doc/unix/unixhelp/Unixhelp/mail_four.7.html (Einblicke ins Internet, 10/1995)To send a carbon copy of the mail message to other users use the command:
~c address1, address2, ...
Make sure that each address is followed by a , (comma).
To send a blind carbon copy of the mail message to another user, use the command:
~b address