RDNS (Reverse Domain Name System) means reverse name registration. It is also called a PTR record.
Rdns identification; hosting or virtual server service, hosting your own server or a leased server
It can be done by the companies that provide the service from which you receive the service. In order to do this, you must inform the ISP company that you have received the service which name you want to be registered to which ip address. For example; For the 192.168.1.1 ip address, you want to register a Rdns as www.domain.com. If you notify the ISP company in this way, they will make the necessary registration for your IP address.
If you do not register with RDNS; You may not be able to send mail to the mail servers of the companies that provide mail service. Most of the companies usually check RDNS records, while some of them check SPF records.
In fact, all servers with DNS service have the possibility to register for RDNS, but when the IP address is allocated, such as RIPE, the main ip providers enter records to enter these RDNS records into the name server addresses of the ISPs that lease the ip address, so only ISPs can enter these records.
If you have received a C Class ip address belonging to you from your ISP company, you can have your IP addresses forwarded to the name server addresses on the server you will provide and enter these records yourself.
I don't think they needed an explanation of what RDNS was, I think they realized this forum is how you request PTRs to be created since calling comcast doesn't help lol.
Thanks so much for taking the time to reach out to us regarding your PTR record setup. I very much appreciate your patience and greatly apologize for the delay in our response. I know how important the services are to your business and we want to do all that we can to assist. I would love to assist you in updating your PTR records. Can you please reach out through https://comca.st/38k0fPu with your first and last name, business service address and account number or phone number?
Hi Michelle - I posted and sent comcast gina a RDNS requestion november 29th and a month later the post and the instant message wasn't replied and the RDNS still isn't inserted into DNS for us.
We're now at production time and I'm trying to reach out and find out how to get a RNDS inserted.
Oh goodness, I don't know how that happened but I'm happy to get it taken care of! My apologies! Please send a private message with the domain and IP that we need to set up the reverse DNS for and your name, the business name, the complete service address (including city, state, ZIP, suite number, etc), and the phone or account number to verify.
For whatever reason I don't get notifications here to my e-mail so I'm responding to say I've responded via instant message from this system again to you gina.
I am so very sorry that the link was not working. I would love to get these PTR records set up for you. Can you please reach out through private message with your first and last name, business service address and account number or phone number?