UspsCom::DoAuth 80040b1aAuthorization failure. You are not authorized to connect to
I'm trying to apply USPS shipping to my checkout. I keep getting 'UspsCom::DoAuth 80040b1aAuthorization failure. You are not authorized to connect to this server. UspsCom::DoAuth'. I tried different USPS server addresses from what I found on the forums and USPS instructions, but so far I can't get in. I did find on the forums the following response:
"eCart uses the V3 rate request API which is not supported on the testing server, you will need to use the production server address, and contact USPS to have you account updated to use the production server."
Is this still the case? Do I have to go with the production address?