2. Requirements

このページは RFC 9989 の該当節を要約し, DMARC tags, DNS names, ABNF, IANA values を保持します.

The requirements cover high-level goals, anti-phishing utility, scalability, and out-of-scope items. DMARC is intended to scale to Internet mail, work with existing DNS and email authentication infrastructure, and help Mail Receivers make handling decisions when domain use fails validation.

The mechanism does not solve all phishing or display-name abuse, and it does not authenticate message content itself.