使用简单JavaMail发邮件的问题。

[orange0328]

我在按照例子做了个一个简单的使用javamail发邮件的程序，第一次运行他的时候没有出现错误，邮件也能正常的发出去，但是重新运行这个程序时出现了

type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception 

org.apache.jasper.JasperException: javax.ejb.EJBException
root cause 

javax.ejb.EJBException
root cause 

java.lang.SecurityException: Access to default session denied

请问是什么原因呢？谢谢！

代码片段如下：

        String from = "*****@163.com";
        String host = "smtp.163.com";
        String to = "***@hotmail.com";   
        Properties props = System.getProperties();

        props.put("mail.smtp.host", host);

        props.put("mail.smtp.auth", "true"); 
        MyAuthenticator myauth = new MyAuthenticator("*****@163.com", "******"); //我有一个继承javax.mail.Authenticator的类
        Session session = Session.getDefaultInstance(props, myauth);

        MimeMessage message = new MimeMessage(session);

        message.setFrom(new InternetAddress(from));

        message.addRecipient(Message.RecipientType.TO,
                             new InternetAddress(to));

        message.setSubject("test program");
        message.setText("This is a test to inform you by java mail");
        message.saveChanges();
        Transport.send(message);

谢谢

[vvpang]

看一下是否有资源没有释放
我手头没有api文档，你仔细再查一下

[orange0328]

问题解决，
将 Session session = Session.getDefaultInstance(props, myauth);
改成
Session session = Session.getInstance(props, myauth);
即可

谢谢