http://www.jb51.net/article/121647.htm
https://www.cnblogs.com/yxhblogs/p/5998463.html
http://www.jianshu.com/p/f6b94596098e
http://www.cnblogs.com/holyknight-zld/archive/2012/09/05/SendEmail.html(框架未知)
原文：http://www.cnblogs.com/nuanxin/p/7873618.html