A reverse dns is a domain name based hostname such as server.yourdomainname.com So if you have opted for a vps or dedicated server then you can email us your company domain name on which we can make server.yourdomain.com here your domain will be your website name you have hosted on server with us.
Once done we will have your server IP have reverse dns zone == that newly created A record viz. server.yourdomainname.com
Once done wait for 24-48 hrs for dns to get propagated and it shall fix any issues there with email delivery due to rdns related issues.
