MX Record

MX Records are fundamental components of Domain Name System (DNS) configuration, specifically governing email routing. When an email is sent to an address at a domain (e.g., [email protected]), the sending mail server queries the DNS for the MX records associated with example.com. These records provide a list of mail servers that are authorized to receive mail for that domain. The records typically include a priority value and the hostname of the mail server. The sending server uses the priority to determine the order in which to attempt delivery to the listed mail servers. For instance, if a domain has multiple MX records, the server attempts delivery to the one with the lowest (highest priority) number first. If that server is unavailable, it proceeds to the next listed server. Proper configuration of MX records is critical for ensuring that outgoing and incoming email reliably reaches the intended recipient's mail system. If these records are incorrect or missing, emails sent to your domain are likely to be rejected or delayed because the sending server will not know where to deliver the message.

For example, if a company's MX records point to a service like Google Workspace, any email sent to that company's domain will first be routed to Google's designated mail servers, which then handle the final delivery to the correct inbox. We recommend verifying your MX records periodically, especially after migrating hosting services or changing email providers, to ensure uninterrupted mail flow. While other records like A records point to the web server IP address, MX records specifically manage the mail flow infrastructure.