Creating a CNAME record for any one of the domain addresses or subdomains that you have in the hosting account will allow you to redirect it to a different domain/subdomain. The forwarded domain address will lose all its records - A, MX and so forth, and will take the records of the domain address it is being pointed to. In this light, you can't set up a CNAME record to redirect your domain to a third-party provider and retain a working email service with the first provider. It is also important to note that a CNAME record is always a string of words rather than a number because it is regularly wrongly identified as the A record of the Internet domain being forwarded. One of the major uses of a CNAME record is to point a domain address that you own through one company to the servers of another provider in case you have created an Internet site with the latter. In this way, the Internet site will appear under your own domain address, not under some subdomain provided by the third-party company.