Email Domain Health Checker
Spot common email configuration gaps with real DNS evidence. Check MX, SPF, DKIM and DMARC DNS records.
Make something useful.
Enter the details, review your result, then copy or export. No account and no AI required.
See a real task before you start
Check MX, SPF and DMARC for a domain you control.
Check email DNS
Look up your public domain records.
Keep this work for next time
Guests can keep using this tool. Members can save and resume drafts across devices, with no AI required.
Save or export a complete editable draft, including repeated line items. Files and passwords are never included. JSON backups stay on your device unless you choose to share them.
Your result
See the output and use its export controls when ready.
Complete the form to get started.
Quality checkpoint
- DNS changes require time to propagate
- Confirm DKIM selectors with your email provider
The calculator, builder or download above works independently. AI Assist is an optional explanation and writing helper, never required to complete the core task.
Check the DNS records that help business email arrive
Email reliability starts at your domain. MX records tell other mail servers where to deliver messages. SPF records describe which servers may send mail for your domain. DKIM uses a cryptographic signature from a sending service, and DMARC specifies how receiving systems should handle failed authentication. This checker asks your website server to look up the public DNS records, then reports what it can actually see. It cannot guarantee inbox placement or verify that an outgoing email will be signed correctly.
Before you start
Email problems often come from one missing or contradictory record. MX controls delivery routing; SPF lists permitted senders; DKIM attaches signatures; DMARC tells receiving servers how to handle authentication failures. Check the real DNS answers rather than guessing.
How to use this tool
- Enter your business domain only, without https:// or an email address. Choose your DKIM selector if known.
- Review the live MX, SPF, DMARC and DKIM responses and any warnings.
- Ask your email provider or hosting engineer to fix the records at the authoritative DNS host, then repeat the check after propagation.
A real-world example
If a company can receive mail but has no DMARC policy, the domain may still work while missing a useful authentication control. Fixing DMARC requires checking the actual senders first so legitimate mail is not rejected.
A missing DKIM record for the chosen selector does not prove that DKIM is disabled. Selectors vary by provider. Do not publish random SPF or DMARC changes without an inventory of senders.
Check this before you finish
- Verify the domain spelling and the intended mail provider.
- Compare SPF mechanisms with actual sending services.
- Check DKIM selector values in the provider dashboard.
What to avoid
A healthy DNS record does not guarantee inbox delivery: reputation and message content matter too.
WHAT THIS TOOL ACTUALLY DOESRead public DNS records and practical warnings; private mailboxes are not accessed.
Frequently asked questions
Does an SPF record mean mail will avoid spam folders?
No. Reputation, message content, alignment, sending behaviour and recipient filtering also matter.
Why would DKIM show “not found”?
The selector may be wrong or the email provider may publish a CNAME at a different selector. Check its documented selector names.
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Use the next tool when you're ready, without rethinking the whole workflow.
