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MX record checker

Enter a domain to inspect its email infrastructure — MX records, SPF, DMARC, DKIM selectors, and an overall security score.

Quick samples
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MX Checker

About this tool

Inspect MX records, SPF policy, DMARC config, and DKIM selectors for any domain. Includes an email security score — instant, browser-based, no signup.

Enter a domain to inspect its email infrastructure — MX records, SPF, DMARC, DKIM selectors, and an overall security score.

No signup requiredRuns in your browserInstant results
How to use
  1. 1

    Enter a domain name in the input field.

  2. 2

    Click Check — the tool fetches MX records and scans TXT records for SPF, DMARC, and DKIM.

  3. 3

    Review the email security score and each section's status (pass, warning, or missing).

  4. 4

    Use the feedback to fix any missing or misconfigured email authentication records.

Why use this tool?
  • →

    Verify MX records and SPF/DMARC are correctly configured before going live with a new domain.

  • →

    Debug email deliverability issues by checking whether SPF and DMARC are properly set up.

  • →

    Check a domain's email security posture before accepting correspondence from it.

ExamplesInput → output

Well-configured domain

Inputgoogle.com
OutputScore: 95/100 — MX ✓ SPF ✓ DMARC (reject) ✓ DKIM ✓

Missing DMARC

Inputexample.com
OutputScore: 60/100 — MX ✓ SPF ✓ DMARC ✗

No email setup

Inputparked-domain.io
OutputScore: 0/100 — No MX records found
Frequently asked questionsCommon questions answered

These answers explain common mx checker tasks, expected input formats, and edge cases so both visitors and search engines can understand what this tool does.

What is an MX record?

An MX (Mail Exchanger) record tells email servers where to deliver mail for a domain. It points to one or more mail servers with priority values — lower priority numbers are tried first.

What is SPF?

SPF (Sender Policy Framework) is a TXT record that lists the mail servers authorised to send email on behalf of your domain. Strict SPF (-all) rejects mail from unlisted servers; soft SPF (~all) marks it as suspicious.

What is DMARC?

DMARC (Domain-based Message Authentication, Reporting & Conformance) builds on SPF and DKIM to tell receiving servers what to do with mail that fails authentication — none (monitor), quarantine (spam folder), or reject (block).

How is the email security score calculated?

The score awards points for having MX records (25), an SPF record (up to 25), a DMARC policy (up to 30), and at least one DKIM key (20). A strict SPF -all and a DMARC reject policy earn the maximum points in each category.