MX lookup and record checker

MX records define which mail servers accept inbound email for a domain. Use this free MX lookup to verify DNS routing before troubleshooting delivery issues.

Why use an MX record lookup tool

• Confirm the right mail host targets and priorities
• Catch DNS mistakes after migrations
• Verify setup for Google Workspace, Microsoft 365, and custom SMTP providers
• Validate records before changing SPF, DKIM, and DMARC policies

People often search for "mx lookup", "mx record lookup", and "mx lookup tool" when debugging email delivery. This checker is built for that exact workflow.

If you normally use queries like "mxtoolbox mx lookup", this page provides the same fast DNS verification flow with direct links into MailSlurp testing workflows.