[kureikain]

When implementing spam filtering for my email forward app (https://hanami.run) I was super confused at DMARC and as the author said. The DMARC keyword were all SEO-focus content by companies that aim for that keyword and didn't clearly give a definition of DMARC.

Another confusion is the ARC, the acronym was alike so I though ARC has some relation to DMARC where they are totally different :).

I think to help new people understand them, we should stop group DMARC with SPF/DKIM. SPF and DKIM are the thing you set up and you control. But DMARC is just a policy to tell the recipient what they should do if something failed SPF or DKIM. And it's totally up to recipient's mail server to support and follow standard of DMARC.