描述
简单邮件传输协议(SMTP)。SMTP在互联网上是主要的电子邮件传输协议。电子邮件经常包含恶意代码程序,所以不应允许以任何控制网络设备接收电子邮件,SMTP邮件应主要用于从控制网络到办公网络之间输出发送报警信息。
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