尝试使用gmail以Java发送电子邮件通常会导致用户名和密码不被接受 [英] Trying to send email in Java using gmail always results in username and password not accepted

问题描述

当我调用send方法时（在设置studentAddress之后），我得到了这个：
$ b

javax.mail.AuthenticationFailedException：535-5.7。 1用户名和密码不被接受。有关详情，请参阅

535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 y15sm906936wfd.10

我敢肯定代码是正确的，并且100％肯定我输入的用户名和密码的详细信息是正确的。那么这是什么错误的gmail或什么？

这是我的代码：

  import java.util。*; 
 import javax.mail。*; 
 import javax.mail.internet。*; 
 
 public class SendEmail {
 
 private String host =smtp.gmail.com; 
 private String emailLogin =[e-mail]; 
 private String pass =xxx; 
 private String studentAddress; 
 private String to; 
私有属性props = System.getProperties（）; 
 
 public SendEmail（）{
 props.put（mail.smtps.auth，true）; 
 props.put（mail.smtps.starttls.enable，true）; 
 props.put（mail.smtp.host，host）; 
 props.put（mail.smtp.user，emailLogin）; 
 props.put（mail.smtp.password，pass）; 
 props.put（mail.smtp.port，587）; 
 to =[e-mail]; 
} 
 
 public void setStudentAddress（String newAddress）{
 studentAddress = newAddress; 
} 
 
 public void send（）{
 Session session = Session.getDefaultInstance（props，null）; 
 MimeMessage message = new MimeMessage（session）; 
尝试{
 message.setFrom（new InternetAddress（emailLogin））; 
 
 InternetAddress [] studentAddressList = {new InternetAddress（studentAddress）}; 
 message.setReplyTo（studentAddressList）; 
 message.setRecipient（Message.RecipientType.TO，new InternetAddress（to））; 
 message.setSubject（Test Email）; 
 message.setText（这是一封测试邮件！）; 
 Transport transport = session.getTransport（smtps）; 
 transport.connect（host，emailLogin，pass）; 
 transport.sendMessage（message，message.getAllRecipients（））; 
 transport.close（）; 
} catch（MessagingException me）{
 System.out.println（发生了电子邮件错误！）; 
 me.printStackTrace（）; 
} 
} 
 
} 
  

...

解决方案

有两种解决方案：

您可以通过链接生成特定于应用程序的密码，即https://accounts.google.com/IssuedAuthSubTokens和
使用生成的特定于应用程序的密码来代替原始密码
。我已经完成了这个工作，它的工作原因为什么异常（javax.mail.AuthenticationFailedException：错误）的原因是

或

535-5.7.1所需的特定于应用程序的密码）是，您可能已经激活了gmail帐户的两步验证。如果您使用的帐户未启用两步验证，则可以通过原始密码发送电子邮件。我也试过这个，它的工作很好。

When I call the send method (after setting studentAddress), I get this:

javax.mail.AuthenticationFailedException: 535-5.7.1 Username and Password not accepted. Learn more at
535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 y15sm906936wfd.10

I'm pretty sure the code is correct, and 100% positive that the username and password details I'm entering are correct. So is this something wrong with gmail or what?

This is my code:

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;

public class SendEmail {

    private String host = "smtp.gmail.com";
    private String emailLogin = "[e-mail]";
    private String pass = "xxx";
    private String studentAddress;
    private String to;
    private Properties props = System.getProperties();

    public SendEmail() {
        props.put("mail.smtps.auth", "true");
        props.put("mail.smtps.starttls.enable", "true");
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", emailLogin);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        to = "[e-mail]";
    }

    public void setStudentAddress(String newAddress) {
        studentAddress = newAddress;
    }

    public void send() {
        Session session = Session.getDefaultInstance(props, null);
        MimeMessage message = new MimeMessage(session);
        try {
            message.setFrom(new InternetAddress(emailLogin));

            InternetAddress[] studentAddressList = {new InternetAddress(studentAddress)};
            message.setReplyTo(studentAddressList);
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("Test Email");
            message.setText("This is a test email!");
            Transport transport = session.getTransport("smtps");
            transport.connect(host, emailLogin, pass);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
        } catch (MessagingException me) {
            System.out.println("There has been an email error!");
            me.printStackTrace();           
        }
    }

}

Any ideas...

解决方案

There are two solution for this:

You can generate the application specific password by the link i.e "https://accounts.google.com/IssuedAuthSubTokens" and use the generated application specific password in place your original password . I have done this and its working

or

The reason why the Exception (javax.mail.AuthenticationFailedException: 535-5.7.1 Application-specific password required) is occurring is that you may have activated the 2-step verification of your gmail account. If you use an account in which you do not activate the 2-step verification then you can send the email by you original password. I have also tried this and its working fine.

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