Free MX lookup: see where a domain receives email
What is an MX record?
MX (Mail Exchange) records tell the internet which servers accept email for a domain. Each entry has a priority and a hostname. When someone sends mail to user@example.com, their server looks up MX for example.com and delivers to the lowest-priority reachable host.
Learn more in our MX record guide.
When to use MX lookup
Email provider migrations
Confirm new MX priorities are live at all resolvers before cutover.
Incident response
Verify whether an outage is DNS-related or mail-server-related.
Security reviews
Spot unexpected mail routes or shadow IT email providers.
SPF alignment checks
Cross-reference MX hostnames with SPF include mechanisms.