MX Record Lookup - Free Online IT Tool

📬 MX Record Lookup

Find the Mail Exchange (MX) records for a domain.

ℹ️ About MX Record Lookup

The MX Record Lookup tool is a diagnostic utility used to identify the mail servers responsible for accepting email on behalf of a specific domain. Mail Exchange (MX) records are a fundamental part of the Domain Name System (DNS). When you send an email, your mail server looks up the MX records of the recipient's domain to know exactly where to deliver the message.

This tool provides a detailed list of these servers, along with their priority (preference) levels. A lower number indicates a higher priority server. Understanding your MX configuration is critical for troubleshooting mail delivery delays, verifying that your backup mail servers are correctly listed, and ensuring that third-party services (like Google Workspace or Microsoft 365) are properly integrated with your domain.

📖 How to use MX Record Lookup

1. Enter the domain name you want to query (e.g., example.com).
2. Click 'Run Tool' to retrieve the MX records from global DNS servers.
3. Review the list of hosts and their associated priority numbers.
4. Verify that these servers match your expected email infrastructure configuration.

❓ Frequently Asked Questions

What does the 'Priority' number mean?

The priority number tells sending servers which MX record to try first. The server with the lowest number is the primary target; higher numbers are used as backups.

What if a domain has no MX records?

If no MX records are found, some mail servers may attempt to deliver mail directly to the domain's 'A' record (IP address), but this is less reliable and not recommended.

How long do MX changes take to update?

Like all DNS changes, MX record updates depend on the Time to Live (TTL) settings and can take anywhere from a few minutes to 48 hours to propagate globally.