PERMIT_DOCKER=none doesn't appear to enforce authentication when running a rootless container?

[StandingPadAnimations]

Hey y'all, I've had some issues recently with my Podman Quadlets setup where I've been receiving random emails from my own server... so I checked for an open relay (just basic telnet to port 25 on my mailserver). I found that, despite setting PERMIT_DOCKER to none in my mailserver.env file, I was still able to connect over telnet without authenticating, and still send messages (albeit denied by the spam filter). I've also tested setting PERMIT_DOCKER in my quadlet file directly, and the issue stll persisted.

For context, I'm running Ubuntu 24.04 (so still Podman 4), with the network driver set to pasta. I'm using the latest release of DMS as well.