MX record(A type of resource record in the Domain Name System (DNS) specifying how Internet e-mail should be routed using the Simple Mail Transfer Protocol (SMTP). Each MX record contains a preference and a host name, so that the collection of MX records for a given domain name point to the servers that should receive e-mail for that domain, and their priority relative to each other)
CNAME record(A type of resource record in the Domain Name System that associates a computer's true (canonical) name with any alias names also used by the computer. Some domain registrars use CNAME records to redirect or redelegate domain names)
