If you wish to forward a domain address that you have to another domain name or subdomain, the best way to do this would be to use a CNAME record. By setting up such a record, the domain being forwarded loses all its records (A, MX, etc) and instead, it takes the A record of the Internet domain it is directed to. This way, if you use a web design service by some provider that gives you a subdomain, you can use an actual domain and not only will it be directed to the Internet site that you've set up, but it will also appear in the web browser address bar at all times. Alternative possible uses of a CNAME record are to forward all of the traffic from various subdomains to their main domain name, or to use the webmail service of your hosting provider by using webmail.your-doman.com, for example. The latter will work only by setting up a CNAME record for a subdomain due to the fact that this kind of a record created for the main domain name makes it impossible to use e-mail addresses.