Hi @sairmali,

They are correct. From submit_sm aka client.send_message() a reference message ID (SMPP spec 4.7.14). At this point, the message is queued, but its delivery is not yet attempted.

If you want to check a delivery status, you have 2 options:

1. Listen to deliver_sm messages

This is what your operator suggested. You need to set registered_delivery=True in client.send_message() and an incoming message listener via client.set_message_received_handler() – see README.md for an example.

The handler will receive an instance of DeliverSM as its only parameter, see also SMPP spec 4.3.1.

You'd need to check esm_class, SMPP spec 4.7.12. SMPP_MSGTYPE_DELIVERYACK would mean this is a delivery receipt.

2. Manually issue query_sm command

See also SMPP spec 4.5.2. This command would allow checking the status of the submitted message at any time. Note, that it takes time for SMSC to process a message, so you won't see a new status immediately.

i am using only this script so, how can i pass "deliver_sm"

import logging
import sys

import smpplib.gsm
import smpplib.client
import smpplib.consts

logging.basicConfig(level='DEBUG')

parts, encoding_flag, msg_type_flag = smpplib.gsm.make_parts(u'Привет мир!\n'*10)

client = smpplib.client.Client('example.com', SOMEPORTNUMBER, 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.receipted_message_id)))

client.connect()
client.bind_transceiver(system_id='login', password='secret')

for part in parts:
pdu = client.send_message(
source_addr_ton=smpplib.consts.SMPP_TON_INTL,
source_addr='SENDERPHONENUM',
dest_addr_ton=smpplib.consts.SMPP_TON_INTL,
destination_addr='PHONENUMBER',
short_message=part,
data_coding=encoding_flag,
esm_class=msg_type_flag,
registered_delivery=True,
)
print(pdu.sequence)
client.listen()