What does netstat show as the listening address? By default, unless you have a
fully configured MTA, sendmail will only listen on the loopback address. The
prevents it from acting as an open relay.

Try specifying 127.0.0.1 as the mail.smtp.host.

On Fri, 02 Nov 2007 09:18:34 -0700, "void.no.spam.com@gmail.com"
<void.no.spam.com@gmail.com> wrote, quoted or indirectly quoted
someone who said :

Sounds like you did not include your password.  See
http://mindprod.com/products.html#BULK
look at my code for logging on in Bulk.java.

// note that send needs a password.
           Properties props = System.getProperties();
           if ( NEED_PASSWORD_TO_SEND )
               {
               props.setProperty( "mail.smtp.auth", "true" );
               }
...
store = session.getStore( RECEIVE_PROTOCOL );
store.connect( RECEIVE_HOST,
                          RECEIVE_PORT,
                          RECEIVE_LOGIN_ID,
                          RECEIVE_PASSWORD );

...
Transport transport = session.getTransport( SEND_PROTOCOL );
transport.connect( SEND_HOST,
                              SEND_PORT,
                              SEND_LOGIN_ID,
                              SEND_PASSWORD );

Also try turning on debugging so you can watch it more detail what is
happening.

In perl you're not opening a file in the first line. The pipe
at the beginning of the "filename" signifies that you're executing
a process, /usr/sbin/sendmail with the parameter "-t".

How to solve the whole thing in a purely java-based way you
already found out (with the help of Nigel, so I show you how
to do the above thing just to complete the topic ;-)

Process p = Runtime.getRuntime().exec(new String[]{
   "/usr/sbin/sendmail",
   "-t"
});
OutputStreamWriter os = new OutputStreamWriter(p.getOutputStream(), "8859_1");
os.write("To: ");
os.write(recipients);
os.write("\n");
os.write("Subject: Test Results\n");
os.write("\n");
os.write("here are the results\n");
os.close();
p.waitFor();

If sendmail is doing output on STDOUT or STDERR you have to read
that (e.g. in a Thread to be able to wait for the end of the
process). But because the JavaMail API is to be prefered this
is purely for information and not intended to be used in production.

Regards, Lothar

I am giving here the full source code by using this code i have
successfully sent mail to any address. You have to set the classpath
of the JavaMail API first... then try this code... with proper values
in the fields

//here is the code
//Author - A. B. Mondal(die4java@gmail.com)

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

// Send a simple, single part, text/plain e-mail

public class TestEmail {

   public static void main(String[] args) {

       // SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!
       String to = "TO@domain.com";
       String from = "from@domain.com";

       // SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!
       String host = "mail.infobase.in";

       // Create properties, get Session
       Properties props = new Properties();

       // If using static Transport.send(),
       // need to specify which host to send it to
       props.put("mail.smtp.host", host);

       // To see what is going on behind the scene
       props.put("mail.debug", "true");
       Session session = Session.getInstance(props);

       try {
           // Instantiate a message
           Message msg = new MimeMessage(session);

           //Set message attributes
           msg.setFrom(new InternetAddress(from));
           InternetAddress[] address = {new InternetAddress(to)};
           msg.setRecipients(Message.RecipientType.TO, address);
           msg.setSubject("UR SUBJECT");
           msg.setSentDate(new Date());

           // Set message content
           msg.setText("This is a test of sending a " +
                       "plain text e-mail through Java.\n" +
                       "BY YOU");

           //Send the message
           Transport.send(msg);
       }
       catch (MessagingException mex) {
           // Prints all nested (chained) exceptions as well
           mex.printStackTrace();
       }
   }
}//End of class

Regards
Aurobindo
Java Developer