在java中发送电子邮件时抛出javax.mail.AuthenticationFailedException

Question

我是java的初学者,我想用java发送一封电子邮件,因为我在Java中使用这段代码.但我的代码抛出异常,我需要一个单挑为什么......

这是异常的堆栈跟踪:

javax.mail.AuthenticationFailedException: 534-5.7.14 <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=AKgnsbsNX
534-5.7.14 No6jJbDc4l7fZ_WLdBD0sNHIIp_nLvplRMm0bYFBnZBF_XOyVvNSdd1FenDZJPwBTFQyRH
534-5.7.14 lriPK3myMm-dXkW3zK0-6XpO7BzI8hfRcByG1k7YiVzXlddTvs7QhjtgCWNcrzMBuPhoof
534-5.7.14 GjME2TgYzXJVHz5MV98nRnr_kq-kP7RmgOtX3IQHLwM5E8QGBC9-2THVQr_Ch_U0-1nZsc
534-5.7.14 yoPuNEw> Please log in via your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/bin/answer.py?answer=78754 wr6sm26888533wjc.24 - gsmtp

    at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:892)
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:814)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:728)
    at javax.mail.Service.connect(Service.java:364)
    at javax.mail.Service.connect(Service.java:245)
    at SendEmail.sendFromGMail(SendEmail.java:50)
    at SendEmail.main(SendEmail.java:18)
sent

这是我的代码

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

public class SendEmail {

    private static String USER_NAME = "me";
    private static String PASSWORD = "xyz";
    private static String RECIPIENT = "abc@seecs.edu.pk";

    public static void main(String[] args) {
        String from = USER_NAME;
        String pass = PASSWORD;
        String[] to = { RECIPIENT };
        String subject = "Java send mail example";
        String body = "Welcome to JavaMail!";

        sendFromGMail(from, pass, to, subject, body);
        System.out.println("sent");
    }

    private static void sendFromGMail(String from, String pass, String[] to, String subject, String body) {
        Properties props = System.getProperties();
        String host = "smtp.gmail.com";
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.user", from);
        props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");

        Session session = Session.getDefaultInstance(props);
        MimeMessage message = new MimeMessage(session);

        try {
            message.setFrom(new InternetAddress(from));
            InternetAddress[] toAddress = new InternetAddress[to.length];

            for( int i = 0; i < to.length; i++ ) {
                toAddress[i] = new InternetAddress(to[i]);
            }

            for( int i = 0; i < toAddress.length; i++) {
                message.addRecipient(Message.RecipientType.TO, toAddress[i]);
            }

            message.setSubject(subject);
            message.setText(body);
            Transport transport = session.getTransport("smtp");
            transport.connect(host, from, pass);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
        }
        catch (AddressException ae) {
            ae.printStackTrace();
        }
        catch (MessagingException me) {
            me.printStackTrace();
        }
    }
}

Answer 1

我有同样的问题 !!

这就是我解决的问题..谷歌出于安全目的阻止它..

从您的浏览器登录该电子邮件..我有谷歌的问题,如果谷歌去了这里:https: //www.google.com/settings/security/lesssecureapps

你会看到关闭或打开.点击"开启"

然后再次尝试你的代码它会起作用,为我工作

Answer 2

1. 确保安全性较低的应用已安装在 https://www.google.com/settings/security/lesssecureapps上
2. 允许每个应用发送电子邮件转到https://accounts.google.com/b/0/DisplayUnlockCaptcha ,然后单击继续.
   
3. 这一次:您可以使用您的应用发送电子邮件,并允许所有操作.

更多链接:
https ://support.google.com/accounts/answer/6010255 https://productforums.google.com/forum/#!topic/gmail/9KCgzXY4G_c

Answer 3

1. 允许从您的 Google 帐户设置中使用安全性较低的应用 https://www.google.com/settings/security/lesssecureapps
2. 打开您的 Gmail > 转到设置 > IMAP/POP 设置 > 启用 IMAP
3. 转到此网址并打开它（完成所有这些步骤肯定会起作用） https://www.google.com/accounts/DisplayUnlockCaptcha

官方帮助指南

https://support.google.com/mail/answer/7126229?hl=zh-CN&visit_id=637246238859828954-474780158&rd=2