CNames map subdomains to domain names. You can point MAIL.domain.com to the Gmail portal for your company, or SALES.domain.com to SalesForce.com. This allows you to use an easy to remember naming strategy for users to access different web services.
MX Records (Mail Exchange) are DNS records that are used to route email to email servers. You can have numerous MX Records posting to different email servers to prevent loss of email due to downtime. […]