Free Tool

Free MX Record Lookup

Check Mail Server Records for Any Domain — Instantly

Look up MX records and verify mail server configuration for any email domain. Perfect for troubleshooting email delivery issues.

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Enter an email address to look up its domain's MX records and mail server configuration

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What Are MX Records?

MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for handling email for a domain. When you send an email to [email protected], the mail system looks up the MX records for example.com to find out where to deliver the message.

Every email domain must have valid MX records configured to receive emails. Without MX records, email delivery fails and messages bounce back to the sender. MX records also specify the priority or preference of multiple mail servers, allowing redundancy and load balancing.

Understanding MX records is essential for email administrators, developers, and anyone troubleshooting email delivery issues. This free MX lookup tool gives you instant visibility into any domain's mail server configuration.

What This Tool Checks

Our MX record lookup performs comprehensive DNS verification.

MX Record Existence

Verifies that the domain has valid MX records configured.

Mail Server Priority

Shows the priority/preference of mail servers.

DNS Resolution

Confirms that DNS can resolve the domain.

Domain Validity

Checks if domain is valid and properly registered.

Why MX Records Matter

MX record verification is critical for reliable email delivery.

Emails Won't Deliver Without MX

Without properly configured MX records, any email sent to the domain bounces back. Valid MX records are a prerequisite for email delivery.

Detect Parked or Dead Domains

Domains without MX records or with misconfigured records are often abandoned, parked, or no longer in use. This helps identify invalid domain addresses.

Identify Mail Provider

MX record lookups reveal which email service provider a domain uses (e.g., Google Workspace, Microsoft 365, custom mail servers).

Verify Domain Configuration

MX lookups confirm that your domain is properly set up to receive emails after registering or migrating email services.

Common Use Cases

MX lookups help with critical email processes.

Domain Setup Verification

Confirm that your domain's MX records are correctly configured after registering or updating email services.

Email Deliverability Debugging

Troubleshoot why emails are bouncing or not being delivered to a domain.

Pre-Send Validation

Check if email addresses are deliverable before sending marketing campaigns or bulk emails.

Domain Health Monitoring

Regularly check your domain's MX records to ensure email service remains properly configured.

Need More Power?

Upgrade to MailRook's full email verification suite for complete email domain validation, API integration, and more.

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Bulk verification

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Frequently Asked Questions

An MX (Mail Exchange) record is a DNS entry that specifies which mail server is responsible for receiving emails for a domain. Every email domain must have at least one MX record to receive email messages.
Our MX lookup tool queries the DNS system to retrieve all MX records for a domain. It then displays the mail server addresses and their priorities, giving you full visibility into the domain's email configuration.
MX record priority determines which mail server receives emails first. Lower numbers have higher priority. If the primary server (lowest number) is down, email systems try the next priority, providing redundancy.
MX lookups fail when: the domain doesn't exist, the domain has no MX records configured, DNS is misconfigured, or the domain is parked. These issues indicate emails cannot be delivered to that domain.
MX record changes typically propagate within minutes to a few hours, depending on DNS TTL (Time To Live) settings. However, some mail servers may cache old records for up to 48 hours. Use this tool to verify your changes have taken effect.
Yes! This MX record lookup tool is completely free. No signup required, no credit card, no limits. Look up as many domains as you need at no cost.

Look Up MX Records Free

Verify mail server configuration for any domain. No signup required. Unlimited free lookups.

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