dns.resolveMx(hostname, callback)

版本历史

版本	变更
v18.0.0	将无效回调传给 `callback` 参数现在会抛出 `ERR_INVALID_ARG_TYPE` 而不是 `ERR_INVALID_CALLBACK`。
v0.1.27	新增于: v0.1.27

hostname <string>
callback <Function>
- err <Error>
- addresses <Object[]>

使用域名系统协议解析 hostname 的邮件交换记录（MX 记录）。传给 callback 函数的 addresses 参数将包含其中包含 priority 和 exchange 属性（例如 [{priority: 10, exchange: 'mx.example.com'}, ...]）的对象数组。

History

Version	Changes
v18.0.0	Passing an invalid callback to the `callback` argument now throws `ERR_INVALID_ARG_TYPE` instead of `ERR_INVALID_CALLBACK`.
v0.1.27	Added in: v0.1.27

hostname <string>
callback <Function>
- err <Error>
- addresses <Object[]>

Uses the DNS protocol to resolve mail exchange records (MX records) for the hostname. The addresses argument passed to the callback function will contain an array of objects containing both a priority and exchange property (e.g. [{priority: 10, exchange: 'mx.example.com'}, ...]).