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dmarc: add support for np= non-existent subdomain policy tag

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Implements parsing, scoring, CLI output, and UI display for the DMARC
np= tag (DMARCbis draft-ietf-dmarc-dmarcbis), which controls policy for
NXDOMAIN subdomains independently of sp=. The score deducts 15 points
from the base and awards them back when np= is absent (good default) or
its strength is equal to or stricter than the effective sp=/p= policy.
This commit is contained in:
nemunaire 2026-05-18 16:03:35 +08:00
commit 3161e392e8
5 changed files with 159 additions and 31 deletions
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3
internal/app/cli_analyzer.go
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@ -202,6 +202,9 @@ func outputHumanReadable(result *analyzer.AnalysisResult, emailAnalyzer *analyze
if dns.DmarcRecord.SubdomainPolicy != nil {
fmt.Fprintf(writer, ", Subdomain Policy: %s", *dns.DmarcRecord.SubdomainPolicy)
}
if dns.DmarcRecord.NonexistentSubdomainPolicy != nil {
fmt.Fprintf(writer, ", Non-Existent Subdomain Policy: %s", *dns.DmarcRecord.NonexistentSubdomainPolicy)
}
fmt.Fprintln(writer)
if dns.DmarcRecord.Record != nil {
fmt.Fprintf(writer, " %s\n", *dns.DmarcRecord.Record)