java - Java在Linux上发送邮件:错误认证

我尝试在Linux服务器上通过Java发送邮件。
我设置为在Tomcat 6上运行，配置SSL
但我收到一条错误消息：

 Can't send command to SMTP host
 javax.mail.MessagingException: Can't send command to SMTP host;
  nested exception is: 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

我的java代码如下：

    String host = "smtp.gmail.com";
    int port = 587;
    String username = "[e-mail]";
    String password = "aabbcc";

    Properties props = new Properties();
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");

    Session session = Session.getInstance(props);

    try {


        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[e-mail]"));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("[e-mail]"));
        message.setSubject("Testing Subject");
        message.setText("Dear Mail Crawler," +
                "\n\n No spam to my email, please!");


        Transport transport = session.getTransport("smtp");
        transport.connect(host, port, username, password);


        Transport.send(message);

        System.out.println("Done");

    } catch (MessagingException e) {
        System.out.println("ERROR: "+e.getMessage());
        System.out.println("ERROR: "+e.toString());

        throw new RuntimeException(e);
    }

如果我配置没有SSL的Tomcat->它可以发送邮件成功
但是在SSL中->我有上述错误

请帮助解决错误。谢谢大家！

最佳答案

我认为它需要安全的TLS连接，请查看this link知道如何进行

关于java - Java在Linux上发送邮件:错误认证，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7555752/