485:/secure/master/mail_admin.c (/secure/master.c)
(static int) purge_mail()
/*
 * Function name: purge_mail
 * Description  : This function will purge the mail system. It will do
 *                the following:
 *                - remove all mailboxes from players that do no longer exist;
 *                - check all message files and remove the names of all
 *                  recipients who no longer exist;
 *                - cross check all message files with all mailboxes and
 *                  remove those message files that are no longer connected
 *                  to any mailbox.
 * Returns      : int 1/0 - success/failure.
 */
