MX Record Lookup

What is an MX Record?

MX (Mail Exchange) records specify the mail servers responsible for accepting email messages for a domain. Lower priority values have higher precedence.

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Understanding MX Records

Priority Values

10 Primary mail server (lowest value = highest priority)
20 Secondary mail server (backup)
30 Tertiary mail server (last resort)

Best Practices

  • Use at least two MX records for redundancy
  • Priority values are typically increments of 10
  • Lower priority servers are tried first
  • Always verify MX records after DNS changes
  • Consider using backup MX services for high availability