MX Records (Mail Exchange) are DNS records that are used to route email to email servers. You can have numerous MX Records posting to different email servers to prevent loss of email due to downtime. Email is sent to servers pointed to in MX records based on Priority which states that the lowest the Priority number the higher the priority of the server. Emails will be routed to MX records of 0 first.
< A Records in DNS point Subdomains to IP Addresses. So MAIL.domain.com points to 10.1.10.100, and VPN.domain.com points to 10.1.10.101. Generally an A Record is created for @ that points to your web server. Then […]