20005
26241
- np:
- Requested Mail Receiver policy for non-existent subdomains (plain-text;
OPTIONAL ). Indicates the policy to be enacted by the Receiver at the request of the Domain Owner. It applies only to non-existent subdomains of the domain queried and not to either existing subdomains or the domain itself. Its syntax is identical to that of the "p" tag defined below. If the "np" tag is absent, the policy specified by the "sp" tag (if the "sp" tag is present) or the policy specified by the "p" tag (if the "sp" tag is absent)MUST be applied for non-existent subdomains. Note that "np" will be ignored for DMARC records published on subdomains of Organizational Domains and PSDs due to the effect of the DMARC policy discovery mechanism described in.
Note that domain names that appear on a public suffix list are not exempt from DMARC policy application and reporting.
- 3A.
- If the set is now empty and the longest PSD ([RFC9091],
) of the Organizational Domain is one that the receiver has determined is acceptable for PSD DMARC (based on the data in one of the DMARC PSD Registry Examples described in of [RFC9091]), the Mail Receiver MUST query the DNS for a DMARC TXT record at the DNS domain matching the longest PSD in place of the RFC5322.From domain in the message (if different). A possibly empty set of records is returned.
Operational note for PSD DMARC: For PSOs, feedback for non-existent domains is desirable and useful, just as it is for org-level DMARC operators. See of [RFC9091] for discussion of privacy considerations for PSD DMARC.
Tag Name | Reference | Status | Description |
---|---|---|---|
np | RFC 9091 | current | Requested handling policy for non-existent subdomains |