JavaMail will not let me to authenticate myself

[Joseph Sweet]

Hi Everyone,

I am able to authenticate myself to my ISP SMTP server through telnet and send (relay) emails to external domains.

HOWEVER for some obscure reason, I cannot do this through the JavaMail API. Could anyone let me know what is wrong with my code?

I appreciate your help.

 
package com.lotontech.mail;
 
import javax.mail.*;
import javax.mail.internet.*;
 
import java.util.*;
 
/**
  * A simple email sender class.
  */
public class SimpleSender
{
 
  /**
    * MAIN method to send a message given on the command line.
    */
  public static void main(String args[])
  {
    try
    {
      String smtpServer="smtp.my.isp.com";
  String username = "my_isp_username";
  String password = "my_isp_password";
 
      String to="[e-mail]";
      String from="[e-mail]";
      String subject="test";
      String body="hello mail";
 
      send(smtpServer, username, password, to, from, subject, body);
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
 
    System.exit(0);
  }
 
  /**
    * "send" method to send the message.
    */
  public static void send(String smtpServer, String username, String password, String to, String from
   , String subject, String body)
  {
    try
    {
      Properties props = System.getProperties();
 
      // -- Attaching to default Session, or we could start a new one --
      // -- Could use Session.getTransport() and Transport.connect()
      // , but assume we're using SMTP --
 
      props.put("mail.smtp.host", smtpServer);
      Session session = Session.getDefaultInstance(props, null);
 
      // -- Create a new message --
      Message msg = new MimeMessage(session);
 
      // -- Set the FROM and TO fields --
      msg.setFrom(new InternetAddress(from));
      msg.setRecipients(Message.RecipientType.TO,
        InternetAddress.parse(to, false));
 
      // -- We could include CC recipients too --
      // if (cc != null)
      // msg.setRecipients(Message.RecipientType.CC
      // ,InternetAddress.parse(cc, false));
 
      // -- Set the subject and body text --
      msg.setSubject(subject);
      msg.setText(body);
 
      // -- Set some other header information --
      msg.setHeader("X-Mailer", "LOTONtechEmail");
      msg.setSentDate(new Date());
 
      // -- Send the message --
      //Transport.send(msg);
 
 
      msg.saveChanges(); // implicit with send()
      Transport transport = session.getTransport("smtp");
      transport.connect(smtpServer, username, password);
      transport.sendMessage(msg, msg.getAllRecipients());
      transport.close();
 
      System.out.println("Message sent OK.");
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }
}
 

While executing the code I am getting this error:

 
javax.mail.SendFailedException: Invalid Addresses;
  nested exception is:
        com.sun.mail.smtp.SMTPAddressFailedException: 530 5.7.1 Relaying not all
owed. If you are MY_ISP_PROVIDER customer, please contact our support at +999-
-999-9999: [e-mail]
 
        at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1196)
        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:584)
        at com.lotontech.mail.SimpleSender.send(SimpleSender.java:86)
        at com.lotontech.mail.SimpleSender.main(SimpleSender.java:30)
Caused by: com.sun.mail.smtp.SMTPAddressFailedException: 530 5.7.1 Relaying not
allowed. If you are MY_ISP_PROVIDER customer, please contact our support at +999
-999-9999: [e-mail]
 
        at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1094)
        ... 3 more
 
 

The code above does work if I try to send the email within smtp.my.isp.com (which does not require authentication), but it fails if I try to email it to some external SMTP server. Probably I am not getting authenticated with my ISP SMTP server. But Why???


[ July 20, 2007: Message edited by: Joseph Sweet ]

[wupeng wu]

I just resolved a problem like yours, hope this is helpful.
As this doc:http://java.sun.com/products/javamail/javadocs/com/sun/mail/smtp/package-summary.html
the smtp authentication is forbidden by default, if you mail server don't require an authentication, you app could connect the server without problem.
But if it need, you need declare it be true before create a connection.

Properties props = System.getProperties();

// -- Attaching to default Session, or we could start a new one --
// -- Could use Session.getTransport() and Transport.connect()
// , but assume we're using SMTP --

props.put("mail.smtp.host", smtpServer);
// add this line
props.put("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props, null);

[Joseph Sweet]

Thanks