How to update rDNS on a Google Cloud Platform server

Email Deliverability is reporting that my PTR record doesn't match my hostname. What can I do to fix this?

Procedure

You can enable use of the custom PTR record in Google Cloud's Networking settings for your instance. Please see Google's instructions for configuring PTR for the most up to date information.

If your server is with another host, please see our guides for other providers.