MX(邮件交换器)——负责处理该域的电子邮件的服务器主机名。

MX (mail exchanger) — the hostname of a server responsible for handling E-mail for the domain.

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然后这些相关电子邮件会减少至主机（静态或动态 IP 地址）以识别有问题的僵尸网络。

These related emails were then reduced to hosts (static or dynamic IP address) to identify the botnet in question.

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通常，这会通过电子邮件或直接记录关于某个主机被拒绝或被允许的消息到日志文件中。

Typically, this would be used to either email or log a message to a log file about a certain host (s) being denied or allowed. The basic format of the spawn option is.

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