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+#!/bin/sh

+set -euC

+

+# nfsn-dns-dmarc DOMAIN NAME EMAIL_NAME POLICY

+

+# nfsn-dns-dmarc "example.com" "" "" "none"

+# nfsn-dns-dmarc "example.com" "" "" "quarantine"

+# nfsn-dns-dmarc "example.com" "" "" "reject"

+

+# Arguments.

+

+domain="$1" ; shift

+name="$1" ; shift

+email_name="${1:-"postmaster"}" ; shift

+policy="$1" ; shift

+

+# Process.

+

+name="_dmarc${name:+".$name"}"

+data="$(

+    printf "%s" \

+        "v=DMARC1; " \

+        "p=$policy; " \

+        "sp=$policy; " \

+        "pct=100; " \

+        "rua=mailto:$email_name@$domain"

+)"

+

+# Update.

+

+nfsn-dns-update "$domain" "$name" "TXT" '' "$data"