2. Requirements

Requirements 覆盖 high-level goals, anti-phishing utility, scalability 和 out-of-scope items. DMARC 旨在扩展到 Internet mail, 与现有 DNS 和 email authentication infrastructure 配合, 并帮助 Mail Receivers 在 domain use failed validation 时作出 handling decisions.

该 mechanism 不解决所有 phishing 或 display-name abuse, 也不直接认证 message content.