@74178bce That's odd for sure, I've never had any issues with Proton. You're using the web interface and not a third-party mail reader? You mention DNS - I guess that means you're trying to set it up with your own domain?
@46ea7cbc yeah, I set it up with thelinuxcast.org. The DNS checker is all green, so I'd assume that means it is ready, but it's not working. And no, I'm just using the Web UI for now. I haven't even got as far as a bridge yet.