【JavaMail】

参考：

https://www.cnblogs.com/rain144576/p/6754264.html

https://blog.csdn.net/jiangtao7913/category_6048418.html

https://blog.csdn.net/shenshibaoma/category_6840588.html

https://blog.csdn.net/shenshibaoma/article/details/72688585?utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromMachineLearnPai2%7Edefault-4.control&dist_request_id=1331302.7649.16182986618202195&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromMachineLearnPai2%7Edefault-4.control

创建文件夹

https://blog.csdn.net/shenshibaoma/article/details/72688585