Appendix A. Technology Considerations

Cette page resume la section correspondante du RFC 9989 et conserve les tags DMARC, noms DNS, ABNF et valeurs IANA.

Appendix A discusses S/MIME, method exclusion, the Sender header field, domain existence tests, Organizational Domain discovery issues, and removal of the historic pct tag. These considerations explain technology choices and changes from earlier DMARC practice.