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Run an MX lookup instantly to validate your domain's mail servers, routing redundancy, and STARTTLS support. Ensure your email infrastructure is healthy and reachable.
Mail Exchange (MX) records are DNS records essential for delivering email to your domain. They tell the rest of the internet which mail servers accept incoming mail for your domain and in what priority order they should be contacted.
Without valid MX records, email sent to your domain will fail to deliver. Having multiple redundant MX records ensures high availability during server outages.
Single points of failure, unresolvable hostnames, or lack of STARTTLS support can severely compromise your email reliability and security.
Type your domain name into the lookup tool above.
Our scanners query global DNS records in real-time.
Analyze host reachability, priorities, and STARTTLS support.
Follow our recommendations to improve mail server resilience.