logging.basicConfig(level='DEBUG')
parts, encoding_flag, msg_type_flag = smpplib.gsm.make_parts(u'test')
client = smpplib.client.Client('*********', **** allow_unknown_opt_params=True)
client.set_message_sent_handler(
 lambda pdu: sys.stdout.write('sent {} {}\n'.format(pdu.sequence, pdu.message_id)))
client.set_message_received_handler(
 lambda pdu: sys.stdout.write('delivered {}\n'.format(pdu.short_message)))
 
client.connect()
client.bind_transceiver(system_id='****', password='****')
dist=['1', '2','3','4','5']
for phone in dist:
 for part in parts:
 pdu = client.send_message(
 source_addr_ton=smpplib.consts.SMPP_TON_NWSPEC,
 source_addr_npi=smpplib.consts.SMPP_NPI_UNK, 
 source_addr='****',
 dest_addr_ton=smpplib.consts.SMPP_TON_INTL,
 dest_addr_npi=smpplib.consts.SMPP_NPI_ISDN,
 destination_addr=phone,
 short_message=part,
 data_coding=encoding_flag,
 esm_class=msg_type_flag,
 registered_delivery=1,
 )
 print(pdu.sequence)
client.listen()