
If you ever point your www. record to another server you will want to setup a redirect for your domain without www. to point to www.
Edit your .htaccess file and add the following code...
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
This is also useful when using a CDN service such as CloudFlare.