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ShipReady

Finding

No DMARC record is published

Receiving servers have no instruction for mail that fails the checks, so forged mail from your domain is more likely to be delivered.

Last updated September 20, 2026

This week · About ten minutes

Why AI-built apps get this

Mail records live in DNS, not in your code, so no coding agent touches them. The result is a password reset that lands in spam and a domain anybody can send mail as. It is one of the few serious items on a result that is fixed entirely outside the app.

What it affects

Receiving servers have no instruction for mail that fails the checks, so forged mail from your domain is more likely to be delivered.

What the evidence line looks like

no TXT record beginning v=spf1 found for example.com

Every finding on a result carries a line like this one: the request that was made and the answer that came back. You can run the same request yourself and get the same answer, which is the point.

The fix

Add a TXT record at _dmarc on your domain, starting with v=DMARC1; p=none; and a reporting address, then tighten it later. Observed: {value}.

Prompt for your coding agent

The domain {domain} has no DMARC record. Add a TXT record at _dmarc.{domain} starting with v=DMARC1; p=none; and a reporting address, then tighten it once reports look clean.

A result gives you this prompt written for your builder, in its own dialect, and a batch prompt that carries every fix at once.

Incidents that involved this

  • Not verified

    First-quarter 2026 assessment of 200 apps

    183 of 200 vibe-coded apps, 91.5 percent, contained at least one vulnerability traceable to AI hallucination or missing security context.

    2026-04
    Read the incident
  • Declared

    CVE growth in AI-generated code

    CVE entries attributed to AI-generated code rose from 6 in January 2026 to more than 35 in March 2026.

    2026-03
    Read the incident
  • Observed

    5,600 vibe-coded apps scanned

    More than 2,000 vulnerabilities and more than 400 exposed secrets found across vibe-coded apps.

    2026-02
    Read the incident
  • Not verified

    Tenzai study of AI-built apps

    69 vulnerabilities across 15 apps built by five AI coding tools.

    2026-02
    Read the incident

Run this check yourself

This page is the explanation of the finding. The free tool runs the same check on your own app and returns the evidence line.

Email authentication check

Related terms

Run the free Launch Risk Check on your app

ShipReady is not a penetration test or a security certification. No automated check can prove an application is secure.

Last updated September 20, 2026