$P
   Hello new user!  I just wanted to greet you and to welcome you to the
system.  We're an informal bunch around here, blah, blah, blah.

   Your Sysop.

As you can see, this is a sample message to greet new users.  It's made to
be "private" or "privileged" so all your new users won't realize that they're
getting the same 'form' message!