Hola existe algun comando o script para mandar un mensaje a una ip fuera de tu red

me refiero como en windows cuando utilizas el cmd  por terminal para enviar un mensaje a una ip determinada  de tu red ,ya que creo que fuera de tu dominio no va..

y este si se modifica ....

import os

def Menu():
   os.system("clear")
   print "---NetSend---"
   print "[1] Send message to a single computer"
   print "[2] Send message to multiple computers"
   print "[3] Send spam to a single computer"
   print "[4] Send spam to multiple computers"
   print "[5] view computers on network"
   
   try:
      option = int(raw_input("Option: "))

      if option == 1:
         get_mach("single", "one", "single_msg_one_mach")

      elif option == 2:
         get_mach("single", "multi", "single_msg_multi_mach")

      elif option == 3:
         get_mach("spam", "one", "spam_msg_one_mach")

      elif option == 4:
         get_mach("spam", "multi", "spam_msg_multi_mach")

      elif option == 5:
         view_comps_on_network()

      else:
         print "error testing..."
         pause = raw_input()
         exit()
         errors("menu_option_err")

   except ValueError:
      print "error testing..."
      pause = raw_input()
      exit()
      errors("menu_option_err")

def get_mach(msg_type, mach_type, net_send_type):
   if mach_type == "one":
      computer_name = raw_input("computer name or ip: ")

      if len(computer_name) == 0:
         #call error
         print "error testing..."
         pause = raw_input()
         exit()

      else:
         get_msg(msg_type, mach_type, net_send_type, computer_name)

   elif mach_type == "multi":
      computer_names = []

      try:
         print "enter the name or ip of the computes with a space between each one"
         print "for example: computer1 computer2 computer3\n"
         computer_names_str = raw_input("computer names: ")

         if len(computer_names_str) < 1:
            #calls errors
            print "error testing..."
            pause = raw_input()
            exit()

         else:
            computer_names = computer_names_str.split()
            get_msg(msg_type, mach_type, net_send_type, computer_names)

      except ValueError:
         #call errors
         print "error testing..."
         pause = raw_input()
         exit()

def get_msg(msg_type, mach_type, net_send_type, computerNames):
   message = raw_input("message: ")

   if len(message) == 0:
      #calls errors
      print "error testing..."
      pause = raw_input()
      exit()

   else:
      if msg_type == "single":
         net_send(net_send_type, computerNames, message, "NA")

      else:
         try:
            spam_count = int(raw_input("number of times to spam: "))

            if spam_count == 0:
               #calls errors
               print "error testing..."
               pause = raw_input()
               exit()

            else:
               net_send(net_send_type, computerNames, message, spam_count)

         except ValueError:
            #calls errors
            print "error testing..."
            pause = raw_input()
            exit()


def net_send(net_send_type, computerNames, message, spamCount):
   if net_send_type == "single_msg_one_mach":
      #send message to single machine
      #os.system("net send %s %s" % (computerNames, message))
      #os.system("PAUSE")
      #Menu()
      print "net send %s %s" % (computerNames, message)
      print "message sent to %s" % computerNames
      pause = raw_input("Press any key to continue...")
      Menu()

   elif net_send_type == "single_msg_multi_mach":
      numb_of_computers = len(computerNames)
      i = 0

      while i < numb_of_computers:
         #os.system("net send %s %s" % (computerNames, message))
         print "net send %s %s" % (computerNames, message)
         print "message sent to %s" % computerNames
         i += 1

      pause = raw_input("Press any key to continue...")
      Menu()

   elif net_send_type == "spam_msg_one_mach":
      print net_send_type
      print computerNames
      print message
      print spamCount

   elif net_send_type == "spam_msg_multi_mach":
      print net_send_type
      print computerNames
      print message
      print spamCount

   else:
      pass

def view_comps_on_network():
   #os.system("net view")
   #os.system("PAUSE")
   print "will use the 'net view' command to list computers on network"
   pause = raw_input()
   Menu()

def errors(error_type):
   print "test1"
   print "error testing..."

Menu()