When setting up domain name settings for a client's company, you are directed to assign a DNS resource record to facilitate inbound emails to their onsite electronic message handling server. Which type of DNS resource record will you need to configure?
AAAA record for linking the domain solely to an IPv6 address.
A record to direct internet traffic to the specific host where the server is located.
CNAME record to alias the company's domain to the email server's domain.
MX record to define the destination mail server and its priority for the domain.