javax.mail.sendfailexception：发送失败；嵌套异常是：发送时的类 javax.mail.authenticationfailexception

Question

我是 java 邮件的新手，我想发送一封带有附件的邮件，所以我想用来自互联网的示例代码创建一个测试邮件，但我得到了

javax.mail.sendfailedexception: sending failed;
nested exception is: class javax.mail.authenticationfailedexception 
at javax.mail.transport.send0(Transport.java.218)
at javax.mail.transport.send(Transport.java.80)

我尝试了不同的身份验证，但我失败了

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

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

      // Recipient's email ID needs to be mentioned.
      String to = "hari@gmail.com";

      // Sender's email My Office mail server
      String from = "hari8750@access.co.in";
      String pass = "Password";
      String host = "172.23.5.10";
      String port = "25";

      // Get system properties
      Properties properties = System.getProperties();

      // Setup mail server
      properties.setProperty("mail.smtp.host", host);
      properties.setProperty("mail.smtp.port", port);
      properties.setProperty("mail.smtp.auth", "true");

      // Get the default Session object.
      Session session = Session.getInstance(properties,new MailAuthentication(from,pass));

      try{
         // 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("Test Mail");

         // Create the message part 
         BodyPart messageBodyPart = new MimeBodyPart();

         // Fill the message
         messageBodyPart.setText("Test Mail Success Hari");

         // Create a multipar message
         Multipart multipart = new MimeMultipart();

         // Set text message part
         multipart.addBodyPart(messageBodyPart);

         // Send the complete message parts
         message.setContent(multipart );

         // Send message
         Transport.send(message);
         System.out.println("Sent message successfully....");
      }catch (MessagingException mex) {
         mex.printStackTrace();
      }
   }
}

import javax.mail.*
public class MailAuthentication extends Authentication
{

    String _user;
    String _pass;
    public GMailAuthenticator (String username, String password)
    {
        super();
        this._user = username;
        this._pass = password;
    }
    public PasswordAuthentication getPasswordAuthentication()
    {
        return new PasswordAuthentication(_user, _pass);
    }
}

我也试过

Session session = Session.getInstance(props,
          new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
          });

和

Session session = Session.getDefaultInstance(properties);

和

Session session = Session.getDefaultInstance(properties);

但我遇到了同样的错误。

请帮我解决这个问题

我正在使用类似 java 环境变量的 Windows PC SMTP 有什么步骤吗？？

提前致谢。

Answer 1

您可以切换到 Gmail 等 Google 开发的应用来访问您的帐户（推荐）或更改您的 settings 以便您的 account is no longer protected by modern security standards。

Answer 2

您必须添加mail.smtp.ssl 和mail.smtp.sender.address 属性.. mail.smtp.sender.address 与 from 属性相同。 它必须工作..它按我的预期工作.. 希望对你有帮助

如果还不能解决你的问题，就分享一下引起的异常堆栈跟踪..