So, your custom domain is not working without prefixing ‘www’ and you are getting error messsage ‘Error 404, requested URL not found on server’ that’s why you have landed here. Many newbie Bloggers are facing the same issue with their blogs, this simply means that there is a problem with their blog redirection or we can say that their naked domain such as bloglution.com is not redirected to www.bloglution.com. There are hundreds of solutions available over internet but you don’t have to mess up with them as Blogger provides this redirection option itself. If you try to change your Blog Address under publishing tab, Blogger wouldn’t accept it and gives you a message that ‘Blogs may not be hosted at naked domains (ex: yourdomain.com). Please add a top-level domain (www.yourdomain.com) or subdomain (blog.yourdomain.com)’. Many newbie’s try this also, but ignores the basic redirection option below it.