Set PTR for LKE nodes IPs
Standalone Linodes have the option to set Reverse DNS (RDNS / PTR record on the IP address).
For LKE: While the underlying Linodes in a LKE cluster is still accessible (and we can set PTR record on the Linodes there), this won't survive a node recycle action.
Would it be possible to declare the desired PTR setting for all nodes in a LKE cluster? This would allow any node to send emails with the correct PTR setting, even if the nodes are recycled.
I'm not entirely sure how to best leverage our API in this situation, there is a setting exposed for adding/modifying the individual Node's PTR/rDNS value
This could allow you to update your PTR after a Linode is recycled, but may require other tools like Terraform to handle automatically.
Otherwise, I typically recommend that people deploy a cluster-external Linode to act as the mail server for an LKE cluster.