Yeah, the code was up for a while, but the site wouldn't let me use it until midnight. Saved me about twelve bux. Just a small regional shipment.
Thanks OP, and thanks Canada Post!
Mine worked fine right away... after midnight. Before midnight eastern time, I got an error just telling me the code was invalid (obviously, since it wasn't Tuesday yet). However, your error is different. I wonder if the servers could be overloaded or something. RFD effect...Error 403--Forbidden
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.4 403 Forbidden
The server understood the request, but is refusing to fulfill it. Authorization will not help and the request SHOULD NOT be repeated. If the request method was not HEAD and the server wishes to make public why the request has not been fulfilled, it SHOULD describe the reason for the refusal in the entity. This status code is commonly used when the server does not wish to reveal exactly why the request has been refused, or when no other response is applicable.