.SMTPSendFailedException: 553 Sorry, over your daily relay limit.

I am using javamail to send mails through SMTP .

I am using authentication at server

I can send the email through the same email id by Outlook express but
when I try to send email by javamail it gives me
exception .SMTPSendFailedException: 553 Sorry, over your daily relay
limit.

Below is the java code that I am using
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.io.*;
public class SendMailUsingAuthentication
{

private static final String SMTP_HOST_NAME =
"myserver.smtphost.com";
private static final String SMTP_AUTH_USER = "myusername";
private static final String SMTP_AUTH_PWD = "mypwd";

private static final String emailMsgTxt = "Online Order
Confirmation Message. Also include the Tracking Number.";
private static final String emailSubjectTxt = "Order Confirmation
Subject";
private static final String emailFromAddress =
"divyendu@xxxxxxxxxxxxxxxxx";

// Add List of Email address to who email needs to be sent to
private static final String[] emailList = {"abc@xxxxxxxxx",
"xyz@xxxxxxxxx"};

public static void main(String args[]) throws Exception
{
SendMailUsingAuthentication smtpMailSender = new
SendMailUsingAuthentication();
smtpMailSender.postMail( emailList, emailSubjectTxt, emailMsgTxt,
emailFromAddress);
System.out.println("Sucessfully Sent mail to All Users");
}

public void postMail( String recipients[ ], String subject,
String message , String from) throws
MessagingException
{
boolean debug = false;

//Set the host smtp address
Properties props = new Properties();
props.put("mail.smtp.host", SMTP_HOST_NAME);
props.put("mail.smtp.auth", "true");

Authenticator auth = new SMTPAuthenticator();
Session session = Session.getDefaultInstance(props, auth);

session.setDebug(debug);

// create a message
Message msg = new MimeMessage(session);

// set the from and to address
InternetAddress addressFrom = new InternetAddress(from);
msg.setFrom(addressFrom);

InternetAddress[] addressTo = new
InternetAddress[recipients.length];
for (int i = 0; i < recipients.length; i++)
{
addressTo[i] = new InternetAddress(recipients[i]);
}
msg.setRecipients(Message.RecipientType.TO, addressTo);


// Setting the Subject and Content Type
msg.setSubject(subject);
msg.setContent(message, "text/plain");
Transport.send(msg);
}


/**
* SimpleAuthenticator is used to do simple authentication
* when the SMTP server requires it.
*/
private class SMTPAuthenticator extends javax.mail.Authenticator
{

public PasswordAuthentication getPasswordAuthentication()
{
String username = SMTP_AUTH_USER;
String password = SMTP_AUTH_PWD;
return new PasswordAuthentication(username, password);
}
}

}

.

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