使用java發送郵件

Question

我嘗試從域發送郵件但收到一些錯誤。

碼：

package SendingClass;

import java.util.*;  

import java.util.Date;
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.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SendEmail  
{  
public static void main(String [] args)
{
    String host="chnmail.hcl.com";
    final String user="allwinjayson.m@hcl.com";
    final String password="*******";
    String to="allwinjayson.m@hcl.com";

    //Get the session object  
    Properties props = new Properties();  
    props.put("mail.smtp.host",host);  
    props.put("mail.smtp.auth", "true");  


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


     //Compose the message  
    try 
    {  
        MimeMessage message = new MimeMessage(session);  
        message.setFrom(new InternetAddress(user));
        message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
        message.setSubject("Praise the Lord");
        message.setText("This is simple program of sending email using JavaMail API");

        //send the message  
         Transport.send(message);  
         System.out.println("message sent successfully...");  
    } 
    catch (MessagingException e) 
    {
        e.printStackTrace();
    }  
}
}  

錯誤：

javax.mail.AuthenticationFailedException: No authentication mechansims supported by both server and client
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:756)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:669)
    at javax.mail.Service.connect(Service.java:313)
    at javax.mail.Service.connect(Service.java:172)
    at javax.mail.Service.connect(Service.java:121)
    at javax.mail.Transport.send0(Transport.java:190)
    at javax.mail.Transport.send(Transport.java:120)
    at SendingClass.SendEmail.main(SendEmail.java:63)

Answer 1

在您的服務器允許您登錄之前，您很可能需要啟用SSL / TLS。 將屬性mail.smtp.ssl.enable或mail.smtp.starttls.enable為true ，具體取決於服務器的要求。

此外，您還需要清除一些常見的JavaMail錯誤 。

Answer 2

這表現得更好嗎？ 這是我的一個Java應用程序的簡化示例，希望我沒有介紹一個copypaste語法錯誤。 它看起來類似於你的代碼，但沒有額外的smtp道具。

Properties prop = new Properties();
prop.put("mail.smtp.allow8bitmime", "true");
prop.put("mail.smtp.timeout", "60000");
prop.put("mail.smtp.connectiontimeout", "60000");
prop.put("mail.smtp.host", "smtp.gmail.com");
prop.put("mail.smtp.port", "465");
prop.put("mail.smtp.auth", "true");
prop.put("mail.smtp.socketFactory.port", "465");
prop.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
prop.put("mail.smtp.from", "myname@gmail.com");

final String username = "myname";
final String pwd      = "mypwd";
Session session = Session.getInstance(prop,
  new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication(username, pwd);
    }
  }
);

Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress( (String)prop.get("mail.smtp.from") ));
((MimeMessage)msg).setSubject("My email title ÅÄÖ", "UTF-8");
msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse("other@world.com", false));

Multipart mp = new MimeMultipart();
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText("This is a body text ÅÄÖ", "UTF-8");
mp.addBodyPart(mbp1);
msg.setContent(mp);

Transport tr = session.getTransport("smtp");
tr.connect();
tr.sendMessage(msg, msg.getAllRecipients());
tr.close();