Question

我发现有很多关于发送电子邮件时身份验证错误的错误，主机是gmail。我也尝试了不同的属性，没有身份验证但仍然没有任何反应我不知道为什么在其他教程上，这段代码是有效的，但是当我试图在这里运行时，它是身份验证错误。我导入了我的库，但仍然是错误的。我也试过不同的Gmail帐户但没有任何反应。我尝试过的所有帐户都已经过验证。怎么了？这是代码：

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SendEmail {
  public static void main(String[] args) {
        Properties properties = new Properties();
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.port", "587");


        Session session = Session.getDefaultInstance(properties, new Authenticator(){
            protected PasswordAuthentication getPasswordAuthentication(){
                return new PasswordAuthentication("mine@gmail.com", "minepass");
            }
        });


        try{
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("yours@gmail.com"));
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("theirs@yahoo.com"));
            message.setSubject("Send meessage");
            message.setText("Email received");
            Transport.send(message);

            System.out.println("Sent");
        }
        catch(MessagingException e){
            throw new RuntimeException(e);
        }


  }
}

这是输出日志：

Exception in thread "main" java.lang.RuntimeException: javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted. Learn more at
535 5.7.8  https://support.google.com/mail/answer/14257 hg3sm8230925pbb.52 - gsmtp

    at SendEmail.main(SendEmail.java:40)
Caused by: javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted. Learn more at
535 5.7.8  https://support.google.com/mail/answer/14257 hg3sm8230925pbb.52 - gsmtp

    at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:809)
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:752)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:669)
    at javax.mail.Service.connect(Service.java:317)
    at javax.mail.Service.connect(Service.java:176)
    at javax.mail.Service.connect(Service.java:125)
    at javax.mail.Transport.send0(Transport.java:194)
    at javax.mail.Transport.send(Transport.java:124)
    at SendEmail.main(SendEmail.java:35)

Answer 1

如果您使用 Gmail 帐户发送电子邮件 (SMTP)，请确保您在应用程序中拥有正确的电子邮件密码，并为您的应用启用此设置允许安全性较低的应用 Gmail 帐户。

允许安全应用-->进入管理账户设置-->左侧导航点击安全-->然后启用不太安全的应用。

Answer 2

确保您已从外部和未经认证的应用启用了与您的Gmail帐户的连接。有关启用安全性较低的应用以连接到Google帐户的详细信息，请检查：https://support.google.com/accounts/answer/6010255?hl=en 从一开始，这可能是您的问题，使安全性较低的应用程序能够连接到您的Gmail帐户并重新运行您的应用程序。

如果这不会有助于尝试将username和password放入属性中，则无需使用Authenticator。这是一个能够发送多个电子邮件的方法的工作示例。
注意：需要javax.mail库

方法参数：
  from - 是您的电子邮件地址（来自gmail）
  pass - 您的密码
  to - 一系列收件人
  subject - 邮件标题
  body - 邮件正文

public 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];

            // To get the array of addresses
            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();
        }
}

使用java身份验证错误发送电子邮件

2 个答案: