MX (mail exchanger) — the hostname of a server responsible for handling E-mail for the domain.
MX(邮件交换器)——负责处理该域的电子邮件的服务器主机名。
The mail exchanger records are used by mail transport agents like sendmail and postfix when looking up where to send E-mail.
邮件交换器记录由诸如sendmail和postfix等邮件传输代理在查找电子邮件发送目的地时使用。
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