Creating a CNAME record for each of the domain names or subdomains you've got in the hosting account allows you to point it to a different domain/subdomain. The forwarded domain will lose all its records - A, MX etc, and will take the records of the Internet domain it is being redirected to. In this light, you cannot set up a CNAME record to redirect your domain to a third-party company and maintain a working email service with the first hosting provider. Additionally, it is important to note that a CNAME record is always a string of words and never a number because it is frequently mistaken for the A record of the Internet domain being redirected. One of the primary uses of a CNAME record is to direct a domain name you own through one provider to the servers of some other provider when you have set up an Internet site with the latter. By doing this, the website will appear under your own domain address, not under some subdomain provided by the third-party company.