Email DNS Health Checker: MX, SPF, DMARC and Mail Security Audit
Run a combined email DNS health check for a domain. This tool checks MX records, SPF, DMARC and basic mail authentication signals so you can quickly see whether the domain is ready for reliable email sending and receiving.
What this email DNS health check covers
Email deliverability depends on several DNS records working together. MX records receive mail, SPF authorizes sending servers, DKIM signs messages, and DMARC creates a policy for authentication failures. This health check focuses on the records that can be inspected from public DNS.
How to improve a weak result
- Add or fix MX records if the domain must receive mail.
- Publish a single valid SPF record with the services that send mail.
- Add DMARC reporting, then move toward quarantine or reject once mail flow is validated.
- Configure DKIM in your mail platform and verify the selector separately.
FAQ
Can this guarantee inbox placement?
No tool can guarantee inbox placement. DNS authentication is only one part of deliverability, but it is a necessary foundation.
Why is DKIM not fully automatic here?
DKIM requires a selector, and each provider can use a different selector. Use the DKIM lookup tool when you know it.
