The MX record is a DNS record where MX stands for mail exchange. It serves for directing and pointing to a mail server. The MX record provides information about how the email messages should be routed. In addition, it indicates which is the accountable server for receiving emails for a particular domain name.
The mail exchange record includes the hostname of the server that handles the emails for a domain and a prioritization code. With it, you could set different priority numbers. That way, you are able to separate the load among more than one server and provide redundancy. Find out more details about the MX record!