7. Other Topics

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.

Other topics include SPF-specific issues, rejecting messages, interoperability issues, and operational interoperability considerations. Rejection behavior must account for SMTP semantics and the possibility of forwarding, mailing lists, or other intermediaries that affect authentication results.