If the sender_s server goes down the sender may lose its copy of the message and, therefore, will not be able to resend it.

如若发送方服务器出故障，发送方就可能丢失消息的副本，因而不能进行重发。

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Therefore, adding a message to the filter allows that message to be received from a lower integrity sender, while removing a message blocks that message from being received.

因此，往消息过滤器中加入一个消息来允许从一个较低完整性的发件人那里收到该消息，同时（也可以）从移除一个被阻止接收的消息块。）

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Therefore, adding a message to the filter allows that message to be received from a lower integrity sender, while removing a message blocks that message from being received.

因此，往消息过滤器中加入一个消息来允许从一个较低完整性的发件人那里收到该消息，同时（也可以）从移除一个被阻止接收的消息块。）

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