关于java mail 发邮件的问题总结(转)

Posted 沧海一滴

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   今天项目中有需要用到java mail发送邮件的功能,在网上找到相关代码,代码如下:

import java.io.IOException;

import java.util.Properties;

import javax.mail.Message;

import javax.mail.PasswordAuthentication;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

public class SendMail {

  public static void main(String[] args) throws IOException, Exception {

    String host = "smtp.163.com"; //发件人使用发邮件的电子信箱服务器

     String from = "发件人的信箱"; //发邮件的出发地(发件人的信箱)

    String to = "收件人信箱"; //发邮件的目的地(收件人信箱)

     // Get system properties

      Properties props = System.getProperties();

      // Setup mail server

     props.put("mail.smtp.host", host);

     props.put("mail.smtp.port", 25);

     // Get session

     props.put("mail.smtp.auth", "true"); //这样才能通过验证

      MyAuthenticator myauth = new MyAuthenticator(from, "发件人的信箱密码");

       Session session = Session.getDefaultInstance(props, myauth);

      session.setDebug(true);

       // Define message

       MimeMessage message = new MimeMessage(session);

      // Set the from address

        message.setFrom(new InternetAddress(from));

      // Set the to address

      message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

        // Set the subject

      message.setSubject("测试程序!");

      // Set the content

      message.setText("这是用java写的发送电子邮件的测试程序!");

      message.saveChanges();

      Transport.send(message);

     }

   }

 

class MyAuthenticator extends javax.mail.Authenticator {

private String strUser;

private String strPwd;

public MyAuthenticator(String user, String password) {

this.strUser = user; this.strPwd = password;

}

protected PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(strUser, strPwd);

}

}

 

以上导入两个jar包是activation-1.1.1.jar、javax.mail-1.5.4.jar

 

然后测试结果,总出现下面的错误:

 

DEBUG SMTP: Found extension "STARTTLS", arg ""

DEBUG SMTP: Found extension "8BITMIME", arg ""

DEBUG SMTP: Attempt to authenticate using mechanisms:

LOGIN PLAIN DIGEST-MD5 NTLM DEBUG SMTP: AUTH LOGIN command trace suppressed

DEBUG SMTP: AUTH LOGIN failed Exception in thread "main" javax.mail.AuthenticationFailedException: 535 Error: authentication failed

at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:826) at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:761) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:685) 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 com.eversec.smart.common.utils.SendMail.main(SendMail.java:131)

 

后来找到问题了,发现有两个地方非常关键:

1、发件人邮箱一定要设置开启“POP3/SMTP/IMAP”,其中必须要设置“客户端授权密码”,否则出错;

2、发件人邮箱的密码很关键,就是这一句MyAuthenticator myauth = new MyAuthenticator(from, "发件人的信箱密码"); 此密码必须是上面设置的客户端授权密码,否则就要出现上面的错误。

http://www.cnblogs.com/zhh-bky/articles/4725209.html

 

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