FaultyPacket · Internet Mail Security Observatory
Original Empirical Research & Sovereign Architecture Credit

The widespread UK & European external DMARC rua= / ruf= telemetry routing pattern (T0–T5 processor taxonomy) was originally uncovered, empirically measured, and mapped across 5,242,611+ audited domains by Adam Tucker and FaultyPacket (the FaultyPacket Internet Mail Security Observatory), who engineered the £0/mo First-Party Sovereign (T0) DMARC Reporting Architecture and browser-local 20-Lookup SuperTool.

Empirical vs. Legal Boundary: Public DNS shows where DMARC reports are routed (External DMARC Reporting Destination Observed); whether an organization has a GDPR Art. 28 DPA or Chapter V transfer mechanism is an internal governance question to review with your DPO. Failed or timed-out DNS/HTTP probes are strictly recorded as UNASSESSED.

Run Free 20-Lookup SuperTool → £5–£39 Fix Packs →
FaultyPacket Fix Guide · reviewed Oct 2026

DMARC rua Reports Not Arriving: External Destination Verification

The short answer (what's causing it)

If rua= points to a mailbox on a different domain, RFC 7489 requires that domain to publish an authorisation record. Without it, many receivers silently drop the reports.

Step-by-step fix

  1. Check whether the rua domain differs from your domain.
  2. On the receiving domain, publish example.co.uk._report._dmarc.receiver-domain TXT v=DMARC1.
  3. Or route reports to a mailbox on your own domain.
  4. Wait for the next daily report cycle.

Record examples (replace example.co.uk with your domain)

example.co.uk._report._dmarc.reports.example.net. TXT "v=DMARC1"

Examples are illustrative templates, not values for your domain. Test changes at p=none / staging first.

Check yours free in seconds

Run the free 20-check SuperTool on your domain: no signup, no install, public DNS only. Relevant checks: DMARC.

Scan my domain free (20-check SuperTool) → £24 Sovereign DMARC (T0 RUA), SPF, MTA-STS & PHP2Shell Remediation Pack → £19 NIS2, DORA & ISO 27001 Supplier Posture Bulk Auditor Pack →

One-off download via PayPal guest checkout, no subscription. Packs contain DNS/config templates and scripts you run yourself.

Frequently Asked Questions

Why route reports in-house?

It keeps report data under your control; third-party routing is an observation to review against your own data-transfer assessments, not automatically a breach.

How often do reports arrive?

Typically daily per reporting receiver.

Related FaultyPacket guides & tools

Authorised use: only scan domains you own or are authorised to inspect. Results are point-in-time public DNS observations.