Domain name

The checker queries the currently published MX DNS records for the entered domain.

What this tool does

This tool queries the MX records currently published in DNS for a domain and sorts them by their numerical priority.

For each listed mail server, it also displays the IPv4 and IPv6 addresses returned by the server resolver.

How to use the tool

Enter a domain name without a protocol, path, email address or port.
Run the check to review the current MX targets, priorities and TTL values.
Compare the resolved addresses when you need to document or troubleshoot the mail-server configuration.

Useful applications

Check which mail servers a domain currently publishes for incoming email.
Verify the order in which MX targets are announced through their priority values.
Document DNS data while investigating a mail delivery or configuration issue.

Notes and limitations

A lower MX priority value is preferred before a higher value. Equal priorities can be selected by sending mail systems according to their own delivery logic.
DNS answers and resolved addresses can change because of caching, provider configuration or regional resolver differences. The tool shows the current response from the server resolver and does not keep a history of changes.

Frequently asked questions

Does a missing MX record always prevent email delivery?

Not necessarily. Some mail systems can fall back to a domain's address records when no MX record exists, but the behavior depends on the sending system and the domain configuration.