@##-##@

  When entered in the TO: field of a message, you may address a message to
  a range of security levels.  You should replace the first ## with the
  lowest security level to address the message to.  The second ## should be
  replaced with the highest security level to address the message to.  This
  macro may only be used in the TO: field of a message.

  Example: @20-35@