I have moved a site from a live domain to a staging domain that will soon become the live domain soon. On the live site there is no issues submitting forms via the API. On the staging site ( http://126.96.36.199/~mikes116/586.716.mwp.accessdomain.com/ ) we continually get a 403 error. With this response:
You don’t have permission to access “http://forms.hubspot.com/uploads/form/v2/######/8baea1cc-b8ca-4c0d-9822-0f084ffb92cb” on this server. Reference #18.c867c917.1487860743.28a19. Could this be due to the odd url string?