Creating a CNAME record for each of the domains or subdomains you've got in the hosting account will allow you to point it to a different domain/subdomain. The forwarded domain name will lose all of its records - A, MX etc, and will take the records of the domain name it is being directed to. In this light, you can't create a CNAME record to forward your domain name to a third-party company and maintain a working e-mail service with the first provider. Additionally, it is essential to know that a CNAME record is always a string of words rather than a number as it is regularly mistaken for the A record of the domain address being forwarded. One of the main uses of a CNAME record is to forward a domain that you own through one company to the servers of another provider if you have created an Internet site with the latter. This way, the website will appear under your own domain, not under some subdomain provided by the third-party company.