Step 4 - Acknowledge delivery receipt

You need to acknowledge the receipt of the DLR with a HTTP 200 (OK) as a response to the previous HTTP request submitted by tyntec to you. If you don’t acknowledge the receipt of the DLR, tyntec will retry to send it to you.

If there is an issue in the processing of the response from tyntec, a message indicating an error should be returned. For example, returning an error code from the 4xx range will trigger a retry from tyntec.