javamail: http://java.sun.com/products/javamail/downloads/index.html ，其中包括mail.jar和文档
Activation.jar : http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-java-plat-419418.html#jaf-1.1.1-fcs-oth-JPR ,其中包括Activation.jar
打开页面后分别点击
进入下载页面，点“ Accept License Agreement ”，下载zip。