An MX (Mail Exchange) Record is a type of DNS (Domain Name System) record that specifies the mail server responsible for receiving and handling email for a specific domain. MX records map a domain to one or more mail servers by providing the server’s domain name (not an IP address) and a priority value. The priority value determines the order in which mail servers should be used when attempting to deliver an email. Lower priority numbers indicate higher priority. If the primary mail server is unavailable, email can be routed to secondary servers with higher priority values. Learn more: https://en.wikipedia.org/wiki/MX_Record