带有 MS Exchange 的 JavaMail：服务器和客户端都不支持身份验证机制

我已经尝试从Grails应用程序发送邮件好几天了，但没有成功。我正在使用：

• 圣杯 1.3.7
• 邮件 1.0 插件
• 弹簧-安全-核心 1.2.6 插件
• 雄猫 7.0.23

具体来说，我正在尝试从部署在Tomcat服务器上的应用程序使用Exchange发送邮件，该端口25没有身份验证，没有SSL。

我尝试从部署应用程序的VMWare虚拟机使用telnet发送消息，但它已经失败了。

这是我的发送邮件的类：

public boolean sendMessage(String to, String msgSubject, String msgText) 
{
    String host = "mail.mydomain.com";
    String username = "myuser@mydomain.com"; // your authsmtp username
    String password = "mypassword" // your authsmtp password
    String from = "myuser@mydomain.com";

    Properties props = System.getProperties();
    props.put("mail.smtp.host", host);
    props.put("mail.smtp.user", username);
    props.put("mail.smtp.password", password);
    props.put("mail.smtp.port", "25"); // thish is the port recommended by authsmtp
    props.put("mail.smtp.auth", "false");

    Session session = Session.getDefaultInstance(props, null);
    MimeMessage message = new MimeMessage(session);
    message.setFrom(new InternetAddress(from));

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

    message.setSubject(msgSubject);
    message.setText(msgText);
    Transport transport = session.getTransport("smtp");
    transport.connect(host, username, password);
    transport.sendMessage(message, message.getAllRecipients());
    transport.close();
    return true;
}

这是错误堆栈跟踪：

javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client

at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:590)

at javax.mail.Service.connect(Service.java:291)

at javax.mail.Service.connect(Service.java:172)

at javax.mail.Service$connect.call(Unknown Source)

at org.helpdesk.MymailService.sendMessage(MymailService.groovy:37)

at org.helpdesk.MymailService$sendMessage.call(Unknown Source)

at org.helpdesk.RequestController$_closure13.doCall(RequestController.groovy:247)

at org.helpdesk.RequestController$_closure13.doCall(RequestController.groovy)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

我已经阅读了几十篇考虑此类问题的帖子，但我仍然没有设法解决问题。任何帮助是值得赞赏的。

*编辑：*在没有身份验证的情况下，使用javaMail和Exchange服务器SMTP发送邮件是否有可能出现一些问题？