mailalias
[options] namesDisplay the email addresses associated with one or more alias names. mailalias displays addresses that are listed in the files /var/mail/name, $HOME/lib/names, and in the files pointed to by the list in /etc/mail/namefiles. mailalias is called by mail.
Note: this command is part of the UPAS mailing system software. Commercial Unix systems all use sendmail, thus this command isn't applicable.
-s
Suppress names; show only corresponding mail address.
-v
Verbose mode; show debugging information.