at least one topic exists Docker: how to use postfix from host
I frequently see connection issues with connections between containers on the same host. I assume there are issues with iptables but I never was in the mood to troubleshoot. as my relevant containers are all http behind reverse proxy I just made intern split-brain dns on the reverse proxy Probably DNS help with NC Docker + Collabora + Wireguard tunnel
Newer Docker versions include a special hostname host.docker.internal → add as --add-host=host.docker.internal:host-gateway argument