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What are the issues with relying on handset delivery receipts?


Question

What are the issues with relying on handset delivery receipts?

Applies To

  • Delivery Receipts (DLR)
  • Outbound SMS

Answer

Handset delivery receipts are one measure of performance but it is not a perfect one. For several reasons:

  • Carriers will most likely prioritize outbound traffic over handset delivery notification.
  • The handset processing the message adds an extra latency to the delivery receipt path.
  • When absent subscriber, no handset delivery receipt is provided in most cases until the phone is connected to the network again.
  • They can be easily faked by operators.

In order to measure the success of our delivery we use a number of sources, of which DLRs are just one of many.

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