Trouble Implementing DPM

[jonathanwood]

I'm running into problems implementing the DPM API.

The documentation states that the relay response URL must match the "Relay Response URL configured in the merchant interface" or else "the transaction is rejected."

1. Does the above even apply when using a test account?  I've never set a relay response in the merchant interface, yet I'm getting an email saying the transaction was successful.
2. The login information for the test account doesn't appear to allow me login to the Authorize.NET merchant account. How would I access the "merchant interface."

[TJPride]

1. Yes, if you want the customer directed to an error / receipt page depending on the outcome of the transaction. The transaction will still go through without relay response, but the customer will probably get an error.

2. https://sandbox.authorize.net/