dns.resolveMx(hostname, callback)


使用 DNS 协议解析 hostname 的邮件交换记录(MX 记录)。传递给 callback 函数的 addresses 参数将包含一个对象数组,每个对象包含 priorityexchange 属性(例如 [{priority: 10, exchange: 'mx.example.com'}, ...])。

【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'}, ...]).】