I have a domain example.com pointing at a Google Cloud load balancer. Requests get served by one of several Compute Engines behind the load balancer.
The load balancer ip is 220.127.116.11
Now when I send email from firstname.lastname@example.org sometimes it gets black listed because the reverse lookup for 18.104.22.168 does not return example.com instead it returns 22.214.171.124.bc.googleusercontent.com
I know that I can set a PTR on the individual virtual machines behind the load balancer but I don't think this will solve the problem.
Is there a solution that will make 126.96.36.199 return example.com or another typical solution?