Want hepl in sending mail vai java code

Question

Hi
I want to write code for sending email from java apllication.
I done that, it works fine onle i send mail within my smtp server i.e. with in my comapny id's but it throws following excpetion when i give from id other than my comapny id
Exception in thread "main" javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
javax.mail.SendFailedException: 550 5.7.1 Unable to relay for meetraj14@
yahoo.co.in
at javax.mail.Transport.send0(Transport.java:219)
at javax.mail.Transport.send(Transport.java:81)
at mailchk.main(mailchk.java:27)
Pleas help me
My code is
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
class mailchk
     public static void main(String[] args) throws Exception
          String to="[email protected]";
          String from="[email protected]";
          String subject="cheking";
          String message="this is a testing mail from java program";
          System.out.println("Hello World!");
          Properties props = new Properties();
          props.put("mail.smtp.host", "xchange.sigma.com");
          Authenticator auth = (new mailchk()).new SMTPAuthenticator();
          Session session = Session.getDefaultInstance(props,auth);
          MimeMessage msg = new MimeMessage(session);
          msg.setFrom(new InternetAddress(from));
          msg.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(to));
          msg.setSubject(subject);
          msg.setSentDate(new Date());
          msg.setContent(message, "text/plain");
          Transport.send(msg);
     private class SMTPAuthenticator extends javax.mail.Authenticator
public PasswordAuthentication getPasswordAuthentication()
String username = "prithvirajm";
String password = "welcome";
return new PasswordAuthentication(username, password);
}

Answer 1

i made changes accordingly
i wrote 1 standalone program which work successfully i.e. it can send more than 1 mail
but in my actual application ,it can send only 1 mail successfully, 2nd time it shows follwing exception
exception occues due to javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused
I am attaching part of application code
please helpme
if(extFuncName.equals("sendEmail"))
     log.info("insdie sending mail");
     try
     try
     CallArg textMsgArgMail = args.getArg("to");
     this.to = textMsgArgMail.getValue();
     log.info("value of to"+this.to);                    textMsgArgMail = args.getArg("from");               this.from = textMsgArgMail.getValue();               log.info("value of from "+this.from);                    textMsgArgMail = args.getArg("subject");               this.subject = textMsgArgMail.getValue();               log.info("value of subject "+this.subject);               textMsgArgMail = args.getArg("email_data");               this.message = textMsgArgMail.getValue();               log.info(" email to be send to"+to+" from "+from+" with subject "+subject);                         log.info("email data "+message);                    }
     catch(CallArgException e){
                                   throw new TaskConfigError("missing input arg FileData in external function "+
extFuncName, t.createTask(), e);
     }                         Properties props = new Properties();               props.put("mail.transport.protocol", "smtp");               props.put("mail.smtp.starttls.enable","true");               log.info("value of smtp host is "+this.smtpHost);          props.put("mail.smtp.host", this.smtpHost);               //props.put("mail.smtp.host", "193.168.1.4");               Session session = Session.getDefaultInstance(props);          
                         MimeMessage msg = new MimeMessage(session);
                         msg.setFrom(new InternetAddress(from));
                         msg.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(this.to));
                         msg.setSubject(this.subject);
                         msg.setSentDate(new Date());
                         msg.setContent(this.message, "text/plain");
                         Transport.send(msg);                    this.to="";                         this.from="";
                         this.subject="";
                         this.message="";                         log.info("email is sent suuceefully");
catch (Exception mailexp)
log.info("exception occues due to "+mailexp.toString());
                    //throw new
          }