Usage: NOTE SENT [NAME|COUNT]
       NOTE SENT [NAME|COUNT|USERS] <f.nick!f.name@host> <date> [RM]
  Displays host and time for messages which are queued without specifying
  any password. If no option is specified SENT displays host/time for
  messages sent from your nick and username.
  NAME displays host/time for messages sent from your username
  COUNT displays number of messages sent from your username
  USERS Displays the number of messages in [], and names for all users
  who have queued any message which matches with spec. nick/name/host.
  RM means that the server removes the messages from the specified user.

  Note that the SENT USERS command is only available to IRC operators.