Mail.ru offers a variety of online communication products and entertainment services for Russian speakers all over the world - email & portal, social networks, instant messaging, online Games, search & e-commerce and cloud storage. One of the easiest ways to use our services and mail.ru is by using our Records Templates. They allow you to create the necessary records in your Master DNS Zone.
In your ClouDNS account, you need to create a Master DNS Zone. If you do not know how to do it, you can check it here. When your Master DNS Zone is created, go to your DNS Zone Control Panel and find the "Records Templates" button, located between the "SOA settings" and "Cloud domains" buttons. Click on it.
From the orange boxes, click on "@mail.ru".