Email DNS Checker: What to Check When Domain Email Breaks
Learn how an email DNS checker reviews MX, SPF, DKIM, and DMARC records so you can find the DNS issue behind broken domain email.
When domain email stops working, the problem is usually in public DNS rather than inside the inbox. A useful email DNS checker separates the domain parts that people often mix together: website hosting, DNS hosting, and email hosting.
Domain Email Doctor follows a simple path: enter a domain once, read the public DNS records, and get practical next steps. You should not need to run extra scans before you know which record needs attention.
What an email DNS check should include
Start with nameservers because they show where DNS is actually managed. Then check MX records to confirm which provider receives mail for the domain.
After MX, review TXT records for SPF and DMARC. DKIM is usually provider-specific, so a missing common selector is a clue to investigate rather than proof that DKIM is completely absent.
Why website hosting can be misleading
A domain can point its website to Vercel, Wix, Squarespace, Shopify, or another host while email is handled by Google Workspace or Microsoft 365. Website A records and CNAME records do not receive email.
If the website works but email fails, avoid changing website records first. Confirm the active DNS host and MX records before touching anything else.
What a good result should tell you
A non-spammy checker should explain the likely issue in plain language, show the exact record family involved, and tell you where the fix belongs.
The best next step is usually one of three actions: add missing MX records, merge a duplicate SPF record, or publish a basic DMARC policy.
Quick checklist
- Confirm the domain's active nameservers.
- Check MX records for the intended mail provider.
- Look for exactly one SPF record on the root domain.
- Check for a DMARC TXT record at _dmarc.yourdomain.com.
- Review DKIM using the selector names from your email provider.