RFC 822 中文版 MIME解析基础(2)(第1-2页)

最新推荐文章于 2024-04-18 08:55:27 发布

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最新推荐文章于 2024-04-18 08:55:27 发布 · 5.1k 阅读

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#structure #框架 #compression #文档 #construction #encoding

该标准定义了电子邮件中文本消息的格式，取代了RFC733。消息由信封和内容组成，标准仅涉及内容格式。内容可能复杂或简单，标准简化了不同视觉格式的解释。邮件由文本行构成，不包含特殊编码，但允许扩展字段和用户自定义字段。框架适合组织内和结构化的跨组织通信。

第1页

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1. INTRODUCTION

1.1. SCOPE

          This standard specifies a syntax for text messages that are
     sent among computer users, within the framework of "electronic
     mail". The standard supersedes the one specified in ARPANET
     Request for Comments #733, "Standard for the Format of ARPA Net-
     work Text Messages".

          In this context, messages are viewed as having an envelope
     and contents.   The envelope contains whatever information is
     needed to accomplish transmission and delivery.   The contents
     compose the object to be delivered to the recipient. This stan-
     dard applies only to the format and some of the semantics of mes-
     sage contents.   It contains no specification of the information
     in the envelope.

          However, some message systems may use information from the
     contents to create the envelope. It is intended that this stan-
     dard facilitate the acquisition of such information by programs.

          Some message systems may store messages in formats that
     differ from the one specified in this standard. This specifica-
     tion is intended strictly as a definition of what message content
     format is to be passed BETWEEN hosts.

     Note: This standard is NOT intended to dictate the internal for-
            mats used by sites, the specific message system features
            that they are expected to suppo