---
title: "Domain check: test a domain's security (free) | Daniel Christensen"
canonical_url: "https://danielchristensen.no/en/tools/domain-check"
last_updated: "2026-09-02T13:55:00.090Z"
locale: en
meta:
  description: "Free domain security check from an ethical hacker. Test email protection, encryption, DNS and HTTP headers in seconds, and get a concrete list of what to fix."
  "og:description": "Free domain security check from an ethical hacker. Test email protection, encryption, DNS and HTTP headers in seconds, and get a concrete list of what to fix."
  "og:title": "Domain check: test a domain's security (free)"
---

Tool

# Domain check

Enter a domain and I check email protection, encryption, DNS and security headers. You get a score and a concrete list of what to fix. All public information, nothing active.

## What does the domain check test?

I look up public information about the domain: the DNS setup for email (SPF and DMARC), the TLS certificate, DNSSEC and CAA, and the security headers the site sends. All of it is passive, ordinary lookups anyone can run. Nothing is attacked.

The score weighs the most important things heaviest: email protection, encryption and the headers that stop common attacks. A low score does not mean you get hacked tomorrow, but every item on the list is a hole worth closing before someone else finds it.

Next step

## Want to dig deeper?

The domain check only looks at the outside. Want a thorough review, active testing and monitoring over time? Get in touch and we will figure out what fits.

[Get in touch →](https://danielchristensen.no/en/contact)