Just hand-built a pod from the docker-compose.yaml for mailu/postfix.  But two problems:

- Is the correct way to set the CIDR for a pod:  --network=slirp4netns:cidr=10.2.21.0/24  ?

- One of the containers in the pod is unbound, which provides DNS for the other containers.  So it must have a static IP, but in pod run --ip= does not work. 

"Error: invalid config provided: rootless containers and pods cannot be assigned static IP addresses"  What do you do about this?

- How does unbound get its queries out of the pod to an authoritatative nameserver?

- The pod is not auto-starting on boot.  There is no --restart-always when creating a pod, so systemd?

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