mail exchange
Quick facts
Purpose
mail exchange
MX is one of the DNS resource record (RR) types defined by RFC 1035.
Example
example.com. 3600 IN MX 10 mail.example.com.
Related record types
Common uses
Format
example.com. 3600 IN MX 10 mail.example.com.
| Field | Explanation |
|---|---|
| Priority | Lower values are tried first. |
| Exchange hostname | The mail server that accepts mail for the domain. |
Common services
Frequently asked questions
Email delivery, Mail server configuration, Domain verification
In the DNS management panel of your registrar or DNS provider (for example Cloudflare or Route53).
Sources & standards
Updated 2026-09-13
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