Does KumoMTA support Proxy Protocol v2 so that I can place it behind an AWS Network Load Balancer and still identify the original client IP addresses for inbound mail?
There’s a PR coming along for it: Add support for proxy protocol by cai-n · Pull Request #440 · KumoCorp/kumomta · GitHub
FWIW, I just merged that PR, so this is available now in main, and will be shortly available in our pre-built dev packages.