Since my site is not indexed on Google, some members told to re-submit the site's sitemap. I did it few days ago. It has been disapproved. It looks to me that there are several extension possible but not .html.... and my sitemap is sitemap.html Any thoughts?
The same problem occured for me. I submitted html site map and was rejected. Then submitted my site to automatically build site map builders especially .xml. This time things work positively. 110 pages indexed in google. Check it with my the site in my signature...
You can also do a sitemap that's nothing more than a simple text file (use the .txt extension) which lists one URL per line and G will accept it.