Original research on how the internet actually uses DMARC, engineering write-ups from building an open-source analyzer, and monthly release roundups.https://dmarc-analyzer.net/blog/enhttps://dmarc-analyzer.net/blog/rua-address-is-attack-surface/https://dmarc-analyzer.net/blog/rua-address-is-attack-surface/My DMARC analyzer would unpack anything mailed to an address I'd published in DNS. How one email could have stopped it, and the bug inside the fix.Fri, 16 Oct 2026 00:00:00 GMTengineering