目前大部分的电子邮件收发软件，都提供简单的过滤功能，不过需要用户对有限的检测项目制定繁琐的规则。
Current Email software could supply simple filters, but the filters need users to make complicated rules in several items.
目前大部分的电子邮件收发软件，都提供简单的过滤功能，不过需要用户对有限的检测项目制定繁琐的规则。
Current Email software could supply simple filters, but the filters need users to make complicated rules in several items.
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