A DNS mail exchange or MX record directs email to a mail server. According to the Simple Mail Transfer Protocol, the MX record specifies how email messages should be delivered (SMTP, the standard protocol for all email). An MX record, like a CNAME record, must always point to a different domain.
An MX (mail exchange) Record is a DNS file entry that indicates the mail server for a domain’s email. To receive email at your domain, you’ll need to set up an MX record.
