nostr:npub1wstchnnatqhe4ua983uhsn7k0mlvxlrdl8nfjledgr6ez7hcppdspcez75 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?