Round robin DNS is a technique of load distribution, load balancing, or fault-tolerance provisioning multiple, redundant Mail Protocol service hosts.
If Artica is installed has a gateway and you want to provide this feature do the following:
- Go into your organization and select "Manage SMTP domains"
- On the new screen, click on "Add A new relayed Domain".
- Â On the new screen, set the new domain name you want to relay and give the "Name server" (not ip address) that will handle multiple IP addresses.
- Click on Add button
Your new domain is added in the relayed domains list.
- Now, click on the domain row.
- Click on Round Robin link at the top-right of the screen.
 
 In the Add a TCP/IP address field, add the differents IP addresses you want Postfix to reach when sending a mail for this domain
