无法使用JavaMail api发送邮件

我正在尝试使用以下代码发送邮件：-

java.awt.EventQueue.invokeLater(
                new Runnable() {

                    @Override
                    public void run() {

                        new SwingWorker<Void, Integer>() {

                            String to = "xx@gmail.com";
                            // Sender's email ID needs to be mentioned
                            String from = "xexx@gmail.com";
                            // Assuming you are sending email from localhost
                            String host = "localhost";
                            // Get system properties
                         //   Properties properties = System.getProperties();

                            // Setup mail server


                            protected Void doInBackground() throws Exception {
                                try {
Properties properties =  new Properties();
properties.put("mail.smtp.socketFactory.port", "465");
properties.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
properties.put("mail.smtp.starttls.enable", "true");
        // Get the default Session object.
        Session session = Session.getDefaultInstance(properties);

                                    // Create a default MimeMessage object.
                                    MimeMessage message = new MimeMessage(session);

                                    // Set From: header field of the header.
                                    message.setFrom(new InternetAddress(from));

                                    // Set To: header field of the header.
                                    message.addRecipient(Message.RecipientType.TO,
                                            new InternetAddress(to));

                                    // Set Subject: header field
                                    message.setSubject("This is the Subject Line!");

                                    // Now set the actual message
                                    message.setText("Message" + jTextField1.getText() + " xx " + jTextField2.getText());

                                    // Send message
                                    Transport.send(message);

                                } catch (Exception x) {
                                    x.printStackTrace();
                                }
                                return null;
                            }

                            protected void process() {

                            }

                            protected void done() {
                                try {

                                    JOptionPane.showMessageDialog(null, "You'll get a response from our team shortly !");

                                } catch (Exception x) {
                                }

                            }
                        }.execute();
                    }

---

如何解决此问题？

除非您在本地环境中运行邮件服务器，否则您需要通过其他邮件属性指定一个：

properties.put("mail.smtp.host", aHost);

例如，如果您使用的是Gmail中继，您将：

properties.put("mail.smtp.host", "smtp.gmail.com");

此外，您还需要会话的

mail.smtp.auth

属性设置

properties.put("mail.smtp.auth", true);

根据最终使用的主机，您可能还需要提供身份验证信息。例如，同样使用Gmail中继：

Session session = Session.getDefaultInstance(props,
    new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication("someUserName", "somePassword");
        }
    }
);

---

您的本地计算机是否设置为有效的

SMTP

主机？@c.pramod您是否使用JDK 7？是否完全相同。现在我得到com.sun.mail.smtp.SMTPSendFailedException:需要530-5.5.1身份验证。Exception@c.pramod-您实际上需要提供有效的凭据（我假设您使用的是Gmail中继？）。在示例中所示的位置填写您的帐户用户名和密码。我添加了此行properties.put（“mail.smtp.auth”，“true”）；而且成功了。。谢谢回复，顺便说一句！！编辑答案以包含缺少的属性和np。祝项目的其余部分好运。

Session session = Session.getDefaultInstance(props,
    new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication("someUserName", "somePassword");
        }
    }
);