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当前电子邮件发展的特点是标准化，ＣＣＩＴＴ和ＩＳＯ联合公布的ＣＣＩＴＴＸ．４００／ＩＳＯ１００２１电子邮件标准为电子邮件的标准化奠定了基础。而Ｘ．４００标准是按照ＯＳＩ参考模型制定的，由于当前ＯＳＩ参考模型推广还不够广泛，因此需要在异构网络环境下实现Ｘ．４００电子邮件系统。本文提出了解决网络异构问题的集成开发平台应具有的特点，结合应用环境介绍了在ＴＣＰ／ＩＰ、ＤＥＣＮＥＴ、ＯＳＩ运输层之上实现集成开发平台的方法，以及在该平台上开发的气象网Ｘ．４００电子邮件系统
The current development of e-mail is characterized by standardization, CCITTX jointly published by CCITT and ISO. 400 / ISO10021 E-mail standard for the standardization of e-mail laid the foundation. And X. 400 standard is in accordance with the OSI reference model developed, due to the current promotion of the OSI reference model is not yet broad enough, it is necessary to achieve X in heterogeneous network environment. 400 e-mail system. This paper presents the characteristics of integrated development platform to solve the problem of network heterogeneity, and introduces the integrated development platform based on the transport layer of TCP / IP, DECNET and OSI combined with the application environment, as well as the meteorological network developed on this platform X. 400 e-mail system