说明：  一种基于E-mail系统的分布式文件系统—— EMDFS，给出了扩展的STMP协议(ESTMP)的状 态转换方式和定义，在此基础上研究了利用ESMTP来构建分布式个人文件系统的方法和模型，设计了EMDFS的模 型、内外存的结构、I/O操作、用户接口以及EMDFS的各种功能。
(A distributed file system based on the E-mail system- EMDFS, given the state of the extended STMP Protocol (ESTMP)-conversion method and definition, in this study based on the method of use to build the file system of distributed personal ESMTP and model, design the EMDFS model, the structure of internal and external memory, I/O operation, the user interface and EMDFS the various functions.)