If you want to direct a domain address that you have to some other domain or subdomain, the best way to do that would be to use a CNAME record. By creating such a record, the domain being pointed loses all of its records (A, MX, and so forth) and instead, it takes the A record of the domain name it's pointed to. By doing this, if you use a web design service by some provider that gives you a subdomain, you can use an actual domain name and not only will it be pointed to the site you have created, but it'll also appear in the Internet browser address bar at all times. Alternative possible uses of a CNAME record are to direct all of the targeted traffic from various subdomains to their main Internet domain, or to use the webmail service of your hosting provider by using webmail.your-doman.com, for example. The latter will work only by creating a CNAME record for a subdomain simply because this kind of a record set up for the main domain name renders it impossible to use e-mail addresses.