关于用javamail发送邮件时，由于邮件服务器要SSL，解决办法
关于用javamail发送邮件时，由于邮件服务器要SSL发送邮件时得到异常如下：
exception reading response: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Google一下，需要保存安装证书
官方的QA http://java.sun.com/products/javamail/FAQ.html#installcert
Q: When connecting to my mail server over SSL I get an exception like "unable to find valid certification path to requested target".
A: Your server is probably using a test certificate or self-signed certificate instead of a certificate signed by a commercial Certificate Authority. You'll need to install the server's certificate into your trust store. The InstallCert program will help.
在这里 http://blogs.sun.com/andreas/entry/no_more_unable_to_find 有解决方案
用 http://blogs.sun.com/andreas/resource/InstallCert.java 的代码来安装证书
1.编译安装证书程序 javac InstallCert.java;
运行安装证书生成证书 java InstallCert smtp.mailtest.com:465
2.将得到jssecacerts文件后复制到jdk1.6.0_16\jre\lib\security或jre1.6.0_06\lib\security\目录
3.编译测试程序 javac -cp ./mail.jar;./ SendMail.java
4.运行java -cp ./mail.jar;./ SendMail
根据提示信息查看邮件发送情况
注。smtp.mailtest.com 为测试的域名。根据实际情况修改测试程序及相关域名。
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