build_dmarc_upgrade

dev.dnsdoctor/dns-doctor · Verify this server

Return a validated DMARC enforcement-upgrade record for a domain. The alignment gate (whether p=reject is safe) is derived server-side from a scan — a caller can never assert alignment. `record` is null when there is no honest upgrade to offer (the domain does not exist; the DMARC lookup itself hit NXDOMAIN while the existence probe did not resolve; the DMARC lookup temp-failed; or the domain already applies a policy at least as strong as this scan justifies): relay `rationale` and never compose a record to fill the gap. A returned record also carries np=reject (the DMARCbis tag covering non-existent subdomains, which can have no legitimate aligned mail) unless the domain already publishes an np tag, which is preserved as-is. Present a returned record verbatim; a human must approve before publishing.