My cPanel is showing an error (was working ok) in the Email Deliverability section.
DNS Errors Occurred (Reverse DNS) - This system does not control DNS for the "my_domain.com" domain. Contact the person responsible for the "arnold.ns.cloudflare.com" and the "jill.ns.cloudflare.com" name servers and request they update the record.
The system failed to complete validation of “my_domain.com”’s “PTR” because of an error: (XID 7gvuen) DNS query (105.XX.XXX.XX.in-addr.arpa/PTR) timeout!
How can I go about fixing this?
The domain is registered using AWS Route53, has been setup for months now.
Also - for the PTR record, I see people say it should not be in the DNS settings of Cloudflare… so should it go in my AWS Route53 records, or in the Cpanel?
I’m not sure what you mean by flipped around? Not sure if it is safe to post the full IP publicly, so I just hid the numbers after the first set. The order of the string is the order that the error message displays.
A PTR for an IP address of 18.104.22.168 looks like 22.214.171.124.in-addr.arpa/PTR
Since you showed the 105, that’s the end of the IP address. Without the beginning two numbers, I don’t know if that’s a Cloudflare IP address, or one that belongs to your host server. Do you know which it is?
Then that means the IP address they want a PTR for is something like 67.xx.xx.105, which probably matches the “A” record for your email server. 67. is not a Cloudflare network, and as my earlier link explained, can’t be PTR-set at Cloudflare.
You cannot create a PTR for Cloudflare owned IP addresses. This is never an issue, nothing will ever receive email from the IP addresses used for hostnames, so they will not perform a rDNS lookup in those IPs.
If you own your own or have been delegated some IP space (generally you need to be a LIR), then you can add the reverse zones to cloudflare, and create PTR records there. Otherwise, you need to contact whoever owns the IP address range you are in.