Good afternoon:

When I submit my sitemap to Google, I get the following errors.

URL unreachable /5xx error
See RFC 2616 for a complete list of these status codes. Likely reasons for this error are an internal server error or a server busy error. If the server is busy, it may have returned an overloaded status to ask the Googlebot to crawl the site more slowly. In this case, we'll return again later to crawl additional pages.

URL unreachable /DNS issue
We couldn't communicate with the DNS server when we tried to access the page.

URL unreachable /robots.txt unreachable
Before we crawled the pages of your site, we tried to check your robots.txt file to ensure we didn't crawl any pages that you had roboted out. However, your robots.txt file was unreachable. To make sure we didn't crawl any pages listed in that file, we postponed our crawl. When this happens, we return to your site later and crawl it once we can reach your robots.txt file. Note that this is different from a 404 response when looking for a robots.txt file. If we receive a 404, we assume that a robots.txt file does not exist and we continue the crawl.

URL unreachable /Network unreachable
We encountered a network error when we tried to access the page.

So what the heck does this mean, and what do I do?

Thanks.

http://www.happyvegan.net