Free DNS Checker

You can check your website with this useful website

http://www.intodns.com/

and check it with DNS Watch

THE SITE BELOW SEEMS TO HAVE DISAPPEARED

Run over 100 diagnostic tests on your domain and email configuration

CheckDNS.net - A very useful service to check your domain, DNS, Mail and Webservers

If you spot errors I cannot advise you on them, google is your friend!