What is the receiving server in DMARC?

I'm trying to wrap my head around DMARC and according to [https://www.fortinet.com/resources/cyberglossary/dmarc](https://www.fortinet.com/resources/cyberglossary/dmarc), "DMARC does not protect your inbound email data stream—at least not when it comes to emails getting sent from outside your organization. Rather, it protects emails being sent from your organization's domain."

But then it also says "The policy a domain owner uses in their DMARC record tells the receiving email server what it should do with email that fails DKIM and SPF checks but claims to be …

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