This paper introduces the structure of distributed E-mail server system for larger Web site and discusses the related key techniques for its realization.

本文介绍了大型网站的分布式邮件服务器系统基本结构，阐述了分布式邮件服务器系统的实现方法及所涉及的关键技术。

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Then you have things like email that abstract away the storage (either on the file system or a server) but only allow you to access the mail through the email program.

然后将邮件存档到文件系统或者一个服务器上，且只能通过邮件系统访问这些邮件。

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Figure 6.2 Example where we receive an E-mail from a mail server using the ESB with POP3 connectivity and sent the E-mail message to the file system.

图6.2，在本例中，我们将使用具有POP3连通性的ESB从邮件服务器接收电子邮件，并把该电子邮件消息发送给文件系统。

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Nor does the system offer an outbound mail server, which will leave many users unable to send messages.

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