Hi @NeelamB91 SMS is always tricky to debug. In your case, the fact that
the SMS are sent 1 hour to each other would indicate a retry on Adobe
Campaign side.Retry will happen if Adobe does not receive the response
(SUBMIT_SM_RESP) in the timely manner to the send request (SUBMIT_SM). I
would say in your case, you should have no SUBMIT_SM_RESP received
within the expiration time (configured on the SMPP External
Account)Check whether you have SUBMIT_SM_RESP with the same ID than the
faulty SUBMIT_...