如何通过本地主机从JavaMail发送邮件(How to Send Mail from JavaMail via Localhost)

 我正在创建一个表单，当用户完成他的详细信息并单击提交时，该表单将通过电子邮件发送详细信息。 
 
 邮件提交与JavaMail： 
 
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

    PrintWriter out = response.getWriter();
    try {
        String host = "localhost";
        String from = "root@localhost.localdomain";

        try {
        Properties props = System.getProperties();
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.debug", "true");

        Session session = Session.getDefaultInstance(props, null);
        session.setDebug(true);
        Transport transport = session.getTransport("smtp");

        MimeMessage message = new MimeMessage(session);
        Address fromAddress = new InternetAddress("root@localhost.localdomain");

        message.setFrom(fromAddress);

        InternetAddress to = new InternetAddress("sendToAliases@localhost.localdomain");
        message.addRecipient(Message.RecipientType.TO, to);

        message.setSubject("Email Details Sending");
        message.setText("This is my testing content.");

        transport.connect(host, from);
        message.saveChanges();
        Transport.send(message);
        transport.close();
    } finally { 
        out.close();
    }
} 
 
 我使用sendToAliases@localhost.localdomain的电子邮件别名，这意味着我可以从sendToAliases有4个电子邮件别名。 但是，在部署和运行上述邮件文件时，我无法收到任何电子邮件。 任何人都可以请教我吗？ 
 
 谢谢。 

I am creating a form, which will send out the details via email upon user completes his details and click submit.
 
Mail Submission with JavaMail:
 
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

    PrintWriter out = response.getWriter();
    try {
        String host = "localhost";
        String from = "root@localhost.localdomain";

        try {
        Properties props = System.getProperties();
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.debug", "true");

        Session session = Session.getDefaultInstance(props, null);
        session.setDebug(true);
        Transport transport = session.getTransport("smtp");

        MimeMessage message = new MimeMessage(session);
        Address fromAddress = new InternetAddress("root@localhost.localdomain");

        message.setFrom(fromAddress);

        InternetAddress to = new InternetAddress("sendToAliases@localhost.localdomain");
        message.addRecipient(Message.RecipientType.TO, to);

        message.setSubject("Email Details Sending");
        message.setText("This is my testing content.");

        transport.connect(host, from);
        message.saveChanges();
        Transport.send(message);
        transport.close();
    } finally { 
        out.close();
    }
} 
 
I am using Email aliases for sendToAliases@localhost.localdomain which means I could have 4 email aliases from sendToAliases. However, I am unable to reach any emails upon deploying and running the above mail file. Can anyone please advise me?
 
Thank you.

原文：https://stackoverflow.com/questions/2088547