This seems to be a waste of time
You don't have permission to access this URL on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Please check the URL for proper spelling and capitalization. If you're having trouble locating a destination on Yahoo!, try visiting the Yahoo! home page or look through a list of Yahoo!'s online services. Also, you may find what you're looking for if you try searching below."
Tell you what. Simply submit the sitemap yourselves via surveyor & get your own 403 forbidden error. That way you can experience the issues yourselves. I've get it every single time. You may want to look into the Moreover one as well:
BTW- I do not appreciate the stupid massive 'Image verification' crap...just sayin. Apparently it's designed to discourage us regular users. Need to tone it down a few notches. Geese a 15 character annoyance.