Additional DNS records

In addition to load balancing between DNS records used for IP resolution — A, AAAA, and CNAME records — Enterprise customers can also load balance between MX and SRV records.

MX records

To load balance between multiple mail servers:

1. Make sure you have the required DNS records for your mail servers.
2. Create a monitor with a Type of SMTP.
3. Create a pool with your mail servers and attach the newly created monitor.
4. Create a load balancer that includes your newly created pools. Since it will forward SMTP traffic, the load balancer should be unproxied (DNS-only).

SRV records

To load balance between different SRV records, which contain significantly more information than many other DNS records:

1. Create your SRV records.
2. Create a monitor with a Type of UDP-ICMP or TCP.
3. Create a pool with your various SRV records and attach the newly created monitor.
4. Create a load balancer that includes your newly created pools. This load balancer should be unproxied (DNS-only).