邮件收发系统，有很好的可运行性，是毕业设计的首选-Mail system, have a good run, it is the first choice for graduate design

邮件管理系统，毕业设计内容，里面包含开题报告，论文，软件报告PPT-E-mail management system, school design content, which includes opening report, papers, software, reports PPT