异常处理

1. javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?

解决方案：mail.smtp.socketFactory.fallback设置为true

2. javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure 

解决方案：jdk导致的，jdk里面有一个jce的包，安全性机制导致的访问https会报错，官网上有替代的jar包，换掉就好了

目录 %JAVA_HOME%\jre\lib\security里的local_policy.jar,US_export_policy.jar

JDK7 http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html

JDK8 http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

案例参考：http://www.cnblogs.com/lihongchen/p/4543562.html#undefined

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