If you have sign up for our Dedicated Server, VPS and Colocation service, you would be able to manage the reverse DNS (rDNS) for the dedicated IPs assigned for your service. Simply follow the below steps to add/edit your rDNS entries :
1. Login to our client area billing system. As soon as you gets in, navigate to Domains > Manage DNS
2. Click on the Manage Reverse DNS button
3. Click the Add button, select the IP address assigned to your services and put in the FQDN (full domain name) at the text box without the "dot" at the end of the domain name. Example server.mydomain.com
4. Hit the Save button once you are done and allow 24-48 hours for the rDNS entries to be fully propagated.