[Solved] Emails unable to be sent/received on VPS even with correct PTR Record

[ocarina]

VPS66 is having trouble sending/receiving emails. My friend told me that the PTR record I requested should be the only one present since there is one more. Another friend of mine said that the first PTR record is for businesses and should not be removed. Is it possible to remove the first PTR record on my VPS?

[KazVee]

This support request is being escalated to our VPS admins who will be able to assist you. 🙂

[Krydos]

Your IPv4 reverse DNS, and IPv6 reverse DNS are both set up correctly for the domain mail.wiimart.org. If you want us to switch it to some other domain just let us know.

On 5/23/2025 at 9:33 AM, ocarina said:

My friend told me that the PTR record I requested should be the only one present since there is one more.

There is one PTR record for your IPv4 and one PTR record for your IPv6. If you're talking about this CNAME

149.191.19.65.in-addr.arpa. 86385 IN    CNAME   149.subnet144.191.19.65.in-addr.arpa.

your friend doesn't know what they are talking about because that is how reverse DNS control is delegated to subnets that are smaller than /24. The only way it could be removed is if we either bought the entire /24, which costs $256 per month, or contacted our ISP every single time some VPS user wanted to change their reverse DNS.

If your friend is talking about "should only be one present" meaning one PTR record between both IPv4 and IPv6, once again they have no idea what they're talking about because if your VPS sends email via IPv6 then that PTR is used and the remote server(s) don't even know about the IPv4 PTR. Likewise if your VPS sends email via the IPv4 then the IPv4 PTR is the only one that matters and remote server(s) have no idea that the IPv6 PTR even exists so they can't possibly interfere with each other.