Email Security

Email DNS Health Check

Check MX, SPF, DMARC, DKIM, MTA-STS, and TLS-RPT from one focused view.

Optional. Enter a selector to check DKIM, for example: default, selector1, google.

What is Email DNS Health Check for?

Email DNS Health Check combines key email checks into one table, showing whether a domain has MX, SPF, DMARC, DKIM, MTA-STS, and TLS-RPT configured.

Recommended workflow

  1. Enter the domain you want to review.
  2. Run the check to see MX, SPF, DKIM, DMARC, MTA-STS, and TLS-RPT status.
  3. Prioritize missing or warning items before putting email into production.

How this tool works

Email security tools combine DNS records, authentication headers, and transport-related signals to explain delivery behavior. They are designed to support SPF, DKIM, DMARC, TLS, blacklist, and header troubleshooting without hiding the technical values.

Part of this tool group

Open nearby tools in the same group to cross-check, inspect deeper, or complete a small workflow.

Open Email Security hub

Frequently asked questions

Does this replace real mail flow testing?

No. It checks DNS configuration; you should still send test messages to confirm real mail flow.

A few nearby utilities you can open quickly when you need to check more.

More in Email Security View all tools

MX Lookup

Shows the mail servers receiving email for a domain and resolves each MX target IP for mail routing checks.

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SPF Lookup

Extracts SPF records from TXT records to identify which sources may send mail for a domain.

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DKIM Lookup

Looks up a DKIM public key by selector to help verify email signing configuration for a domain.

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DMARC Lookup

Looks up the DMARC record at _dmarc to review how a domain handles spoofed or unauthenticated mail.

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SPF Analyzer

Analyzes SPF mechanisms, counts DNS lookups, and highlights settings that may cause SPF failures.

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DMARC Analyzer

Reads DMARC policy, SPF/DKIM alignment, pct, rua/ruf, and key settings for anti-spoofing reviews.

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