What a DNS MX Record Does and How to Fix MX Record Failures
DNS (Domain Name System) records are the important parts of DNS that store the information about a domain and its resources. Every type of a DNS record has a distinct function. DNS records determine mail servers for the domain, map domain names to IP addresses and IPs to domain names, specify the authoritative name servers for the domain, aliases one domain name to another, hold arbitrary text data for various purposes, such as SPF, DKIM, and DMARC configuration, and other.