It is usually safe to assume that each different IP address corresponds to a different end user.
假设每一个不同的IP地址都对应一个不同的末端用户，通常来说都是安全的。
Also, occasionally, a user mistakenly adds your address to their address book and you end up essentially getting somebody else's mail.
另外，有些时候，用户错误地将您的地址添加到他们的地址簿中，并且您将收到某些其他用户的邮件。
Together these systems and requirements form the integration scenarios which the portal needs to address to provide a unified view to the end user.
这些系统和需求一起构成了集成场景，门户需要满足这些场景以向最终用户提供一个统一视图。
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