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Question

我正在使用我的Gmail帐户运行这个简单示例，但它无效并发出以下错误：

      send failed, exception: com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first. nv2sm4478384pbb.6

这是我的代码

   public class Email
{
   public static void main(String [] args)
   {

       Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.googlemail.com");
        props.put("mail.from", "myemail@gmail.com");
          Session session = Session.getInstance(props, null);

        try {
            MimeMessage msg = new MimeMessage(session);
            msg.setFrom();
            msg.setRecipients(Message.RecipientType.TO,
                              "myemail@hotmail.com");
            msg.setSubject("JavaMail hello world example");
            msg.setSentDate(new Date());
            msg.setText("Hello, world!\n");
            Transport.send(msg);
        } catch (MessagingException mex) {
            System.out.println("send failed, exception: " + mex);
        }
   }
}

Answer 1

您可能尝试使用端口25上的Gmail服务器通过未经身份验证的连接向第三方发送邮件。 Gmail不允许您这样做，因为任何人都可以使用Gmail的服务器向任何其他人发送邮件。这被称为开放中继，并且在早期是垃圾邮件的常见推动者。互联网上不再接受开放式继电器。

您需要让SMTP客户端使用经过身份验证的连接来连接到Gmail，可能是port 587。

Answer 2

smtp port和socketFactory必须更改

    String to = "reciveremail@xxxx.xxx";
    String subject = "subject"
    String msg ="email text...."
    final String from ="senderemail@gmail.com"
    final  String password ="senderPassword"


    Properties props = new Properties();  
    props.setProperty("mail.transport.protocol", "smtp");     
    props.setProperty("mail.host", "smtp.gmail.com");  
    props.put("mail.smtp.auth", "true");  
    props.put("mail.smtp.port", "465");  
    props.put("mail.debug", "true");  
    props.put("mail.smtp.socketFactory.port", "465");  
    props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");  
    props.put("mail.smtp.socketFactory.fallback", "false");  
    Session session = Session.getDefaultInstance(props,  
    new javax.mail.Authenticator() {
       protected PasswordAuthentication getPasswordAuthentication() {  
       return new PasswordAuthentication(from,password);  
   }  
   });  

   //session.setDebug(true);  
   Transport transport = session.getTransport();  
   InternetAddress addressFrom = new InternetAddress(from);  

   MimeMessage message = new MimeMessage(session);  
   message.setSender(addressFrom);  
   message.setSubject(subject);  
   message.setContent(msg, "text/plain");  
   message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));  

   transport.connect();  
   Transport.send(message);  
   transport.close();
   }

希望它对你有用..

Answer 3

添加

props.put("mail.smtp.starttls.enable", "true");

解决了我的问题;）

我的问题是 ：

com.sun.mail.smtp.SMTPSendFailedException：530 5.7.0必须先发出STARTTLS命令。 u186sm7971862pfu.82 - gsmtp

at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2108)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1609)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1117)
at javax.mail.Transport.send0(Transport.java:195)
at javax.mail.Transport.send(Transport.java:124)
at com.example.sendmail.SendEmailExample2.main(SendEmailExample2.java:53)

Answer 4

我在构建电子邮件通知应用程序时也面临同样的问题。你只需要添加一行。下面的一个节省了我的一天。

props.put("mail.smtp.starttls.enable", "true");

com.sun.mail.smtp.SMTPSendFailedException：530 5.7.0必须先发出STARTTLS命令。 h13-v6sm10627790pgp.13 - gsmtp

at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2108)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1609)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1117)
at javax.mail.Transport.send0(Transport.java:195)
at javax.mail.Transport.send(Transport.java:124)
at com.smruti.email.EmailProject.EmailSend.main(EmailSend.java:99)

希望这会对你有所帮助。

Answer 5

试试这段代码：

Properties props = new Properties();
                        props.put("mail.smtp.host", "smtp.gmail.com");
                        props.put("mail.smtp.socketFactory.port", "465");
                        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
                        props.put("mail.smtp.auth", "true");
                        props.put("mail.smtp.prot", "465");

                        Session session = Session.getDefaultInstance(props,
                                new javax.mail.Authenticator() {
                            protected PasswordAuthentication getPasswordAuthentication() {

                                return new PasswordAuthentication("PUT THE MAIL SENDER HERE !", "PUT THE PASSWORD OF THE MAIL SENDER HERE !");
                            }
                        }
                        );
                        try {
                            Message message = new MimeMessage(session);
                            message.setFrom(new InternetAddress("PUT THE MAIL SENDER HERE !"));
                            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("PUT THE MAIL RECEIVER HERE !"));
                            message.setSubject("MAIL SUBJECT !");
                            message.setText("MAIL BODY !");
                            Transport.send(message);

                        } catch (Exception e) {
                            JOptionPane.showMessageDialog(null, e);
                        }

您必须降低邮件发件人的安全性。如果问题仍然存在，我认为它可能是由防病毒引起的，试着禁用它..

Answer 6

Google现在具有一项功能，指出它不允许不安全的设备发送电子邮件。当我运行程序时，它在第一篇文章中提出了错误。我必须进入我的帐户并允许不安全的应用程序发送电子邮件，方法是单击我的帐户，进入“安全”选项卡，并允许不安全的应用程序使用我的gmail。

Answer 7

    String username = "mail@google.com";
    String password = "some-password";
    String recipient = "myemail@hotmail.com");

    Properties props = new Properties();

    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.from", "myemail@gmail.com");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.port", "587");
    props.setProperty("mail.debug", "true");

    Session session = Session.getInstance(props, null);
    MimeMessage msg = new MimeMessage(session);

    msg.setRecipients(Message.RecipientType.TO, recipient);
    msg.setSubject("JavaMail hello world example");
    msg.setSentDate(new Date());
    msg.setText("Hello, world!\n");

    Transport transport = session.getTransport("smtp");

    transport.connect(username, password);
    transport.sendMessage(msg, msg.getAllRecipients());
    transport.close();

必须首先发出STARTTLS命令

7 个答案:

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