Emerald Red Team

ERT-CONFIG-013

Email spoofing protection weak (SPF/DMARC)

MediumA02:2025CWE-290

Why it matters

Anyone can send email that looks like it came from your domain, which powers phishing of your users.

How to fix it

Publish an SPF record and a DMARC record with p=quarantine or p=reject.

How we test it

Passive — runs in the free check, looks only at what a browser can see.

Does your app have this problem?

The free Quick Check tests for it.

Scan my app — free