I am having a hard time figuring out what steps are needed to set a PTR record on a VM since I want to run a mailserver on it. My scenario looks like this:
- (unfortunately because of planned migration) I have two GCP accounts and therefor two seperate GCP projects and therefor two GCP Cloud DNS
- I own $domain.com and DNS is set up on first account
- on second account: I created a new zone for mail.$domain.com (mail.$domain.com NS and SOA where created)
- on first account: I delegated mail.$domain.com to second account by setting up DNS NS records for mail.$domain.com and enter provided nameservers of second account
- on second account: I was able to create a A record for mail.$domain.com pointing to VM public IP and I can verify it resolves mail.$domain.com as expected to provided public IP
On second account: now I want to add the PTR record. My approach is to edit my running VM and edit network interface and adding "Public DNS PTR Record" - "Enable for IPv4" with value: mail.$domain.com. Unfortunately I am getting:
"Editing VM instance "mailcow-testing-tf" failed. Error: Invalid value for field 'resource.publicPtrDomainName': 'mail.$domain.com.'. Please verify ownership of the PTR domain at https://www.google.com/webmasters/verification/verification?domain=mail.$domain.com."
Following this link results in a dead end: "We are sorry, but you do not have access to Google Search Console. Please contact your Organization Administrator for access."
Question is: how to add a PTR record for my running VM in second account?
Cheers
