As we all know, the real time delivery report is being updated frequently from the operator, now we have added Statistics Graph for your Sent Bulk SMS Delivery Report. You can view this stats on your Download Delivery Report Page.
Type of Status you may receive from operator:
Success : If messages are successfully delivered.
DND Fail: If recepient is registered with TRAI as DND.
Absent Subscriber: Its a temporary error, SMSC will retry for delivery.
INBOX FULL: Its a temporary error, SMSC retries for delivery.