
Running a mailserver in Kubernetes
Running a webserver in Kubernetes is easy, but a mailserver is more challenging. Most of the challenging things has todo with your ip infrastructure, ingress and loadbalancer within Kubernetes. Here are things I learned when I was deploying a mailserver based on Postfix on Kubernetes with metallb and nginx ingress. If you have a different setup, things could apply or not. Prevent mail loops on your secondary MX Your postfix MX pod is running maybe on a private ip RFC1918, this is fine....