Setting up a CNAME record for each of the domains or subdomains you've got in the hosting account will permit you to redirect it to a different domain/subdomain. The forwarded Internet domain will lose all its records - A, MX and so forth, and will take the records of the domain name it's being forwarded to. In this light, you cannot create a CNAME record to point your domain to a third-party company and keep a functional email service with the first hosting company. It's also essential to know that a CNAME record is always a string of words rather than a number because it is often mistaken for the A record of the domain name being redirected. One of the main uses of a CNAME record is to point a domain name you own through one provider to the servers of another provider when you have set up a site with the latter. This way, the site will appear under your own domain, not under some subdomain provided by the third-party provider.