dns.resolveMx(hostname, callback)


使用DNS协议处理邮件交换记录主机名(MX记录)。adresses参数是传递给callback函数的主机名对象数组,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'}, ...]).