http://www.fmi.uni-passau.de/archive/doc/unix/unixhelp/Unixhelp/mail_five.2.1.html (Einblicke ins Internet, 10/1995)Check on the status of biff by entering the command:
biff
A y indicates that biff is already active; a n that biff is disabled.
To activate biff put the line
biff y
in your .login file.