PUBLIC DNS
Look up live MX records.
Query public MX records to see which mail exchangers currently receive mail for a domain.
MX records tell sending servers where to deliver inbound mail. Priority order is failover, not load balancing between unrelated providers.
An MX answer does not prove inbox placement, alias routing, or SMTP credentials. For a scored MailerZ readiness scan across MX, leftover routes, SPF, DKIM, and DMARC, use Troubleshooting.
Open the full DNS diagnostic · Simulate a route in the Email Routing Lab
Cited standard: RFC 5321
MX records tell sending servers where to deliver inbound mail. Priority order is failover, not load balancing between unrelated providers.