Validation Page
MX Record Checker for Email Domain Validation
Verify whether an email domain has valid MX records and can receive mail. Use EmailCheck to validate domains, mail servers, and deliverability signals in real time.
Why this matters
An address can look syntactically valid and still be undeliverable. MX record validation helps confirm that the domain can accept email, which is critical for transactional messaging, onboarding, and sales outreach.
Recommended next step
Use the homepage checker for a quick manual test, then wire the API into your form or signup flow.
What EmailCheck helps you do
Catch domains with no working mail servers before they reach your database.
Inspect returned MX providers to understand whether the inbox is personal, professional, or low quality.
Pair domain checks with disposable and blocklist signals to avoid false confidence.
Signals returned by the API
Each field corresponds to a real detection capability you can use directly in your business logic.
mxBoolean result that confirms whether valid MX records exist for the domain.
mx_recordsDetailed MX hostname and priority data for audits, support, or debugging.
mx_providersProvider metadata that helps distinguish mailbox services and common mail infrastructure.
Common workflows
- B2B lead forms that need reachable work email addresses.
- Support forms where invalid domains slow customer follow-up.
- Internal admin tools that import or validate new contacts.
How to implement it
- Send the email address to the EmailCheck API.
- If `mx` is false, ask the visitor to correct the address before submission.
- Optionally store `mx_records` in logs to help investigate recurring domain problems.
Frequently asked questions
What does an MX record checker do?
It confirms whether the domain is configured to receive mail by checking DNS mail exchanger records.
Is MX validation enough on its own?
No. A domain may have MX records and still be disposable, public, or risky. It works best alongside broader email intelligence signals.
Why expose MX records in the response?
They help engineering and support teams understand provider setup, troubleshoot domain issues, and debug edge cases.
Related pages
Explore more email verification topics and best practices for different use cases.
Disposable Email Checker for Signup Forms
Detect disposable, temporary, and throwaway inboxes before fake users create accounts. Check temp mail domains in real time with the EmailCheck API.
Public Email Detection for Business Signup Flows
Detect public email domains like Gmail and Yahoo so you can request work emails for demos, sales inquiries, and B2B onboarding.
Role Account Detection for Shared Inboxes
Flag role-based email addresses like hello@, sales@, and support@ during signup or lead capture. Use EmailCheck to identify shared inboxes in real time.
One API call covers all your verification needs
No need to integrate multiple services. EmailCheck provides a unified interface for everything from basic validation to advanced risk detection.