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dns: add HELO/PTR consistency check

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Compare the HELO/EHLO hostname announced by the sending server (first
Received hop) against the sender IP's PTR records, surfacing the same
signal as x-ptr/policy.ptr in Authentication-Results. Adds helo_hostname
and helo_ptr_match to DNSResults, applies a 15-point PTR sub-score
penalty on mismatch, and displays the result in a new HELO/PTR
Consistency card.
This commit is contained in:
nemunaire 2026-06-06 13:27:35 +09:00
commit e168446b44
10 changed files with 460 additions and 0 deletions
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8
web/src/lib/components/DnsRecordsCard.svelte
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@ -6,6 +6,7 @@
import DkimRecordsDisplay from "./DkimRecordsDisplay.svelte";
import DmarcRecordDisplay from "./DmarcRecordDisplay.svelte";
import GradeDisplay from "./GradeDisplay.svelte";
import HeloPtrMatchDisplay from "./HeloPtrMatchDisplay.svelte";
import MxRecordsDisplay from "./MxRecordsDisplay.svelte";
import PtrForwardRecordsDisplay from "./PtrForwardRecordsDisplay.svelte";
import PtrRecordsDisplay from "./PtrRecordsDisplay.svelte";
@ -92,6 +93,13 @@
{senderIp}
/>
<!-- HELO / PTR Consistency -->
<HeloPtrMatchDisplay
heloHostname={dnsResults.helo_hostname ?? receivedChain?.[0]?.from}
ptrRecords={dnsResults.ptr_records}
heloPtrMatch={dnsResults.helo_ptr_match}
/>
<hr class="my-4" />
<!-- Return-Path Domain Section -->