MX Lookup

Check your domain's MX (Mail Exchange) records to verify email server configuration

What are MX Records?

MX (Mail Exchange) records are DNS records that specify which mail servers are responsible for receiving email on behalf of your domain. When someone sends an email to your domain, their mail server looks up your MX records to know where to deliver it.

Multiple MX records can be configured for redundancy. If the primary mail server is unavailable, the sending server will try the next one based on priority values.

Priority Values:

  • Lower values = Higher priority: The mail server with priority 10 is tried before priority 20
  • Equal priorities: Mail servers with the same priority are tried in random order
  • Typical range: 0-65535, but commonly use 10, 20, 30, etc.

Best Practices:

  • Have at least 2 MX records for redundancy
  • Use different mail servers in different locations
  • Set appropriate priority spacing (10, 20, 30)
  • Point to mail servers, not CNAME records