problem in sending mail

[Saravanan Thirugnanam]

Hi all,

I am trying to write a simple java program to send email using JavaMail API.
I have put mail.jar in my class path and used the following code for the same.

 
 
// Send a simple, single part, text/plain e-mail
public class TestEmail {
 
    public static void main(String[] args) {
    
       //from and to address
        String to = "[e-mail]";
        String from = "[e-mail]";
        //ip address of our company mail server
        String host = "172.27.165.255";
 

        // 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,null);
 
        try {
            // Instantiatee 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("Test E-Mail through Java");
            msg.setSentDate(new Date());
 
            // Set message content
            msg.setText("This is a test of sending a " +
                        "plain text e-mail through Java.\n" );
            //Send the message
            Transport.send(msg);
        }
        catch (MessagingException mex) {
            // Prints all nested (chained) exceptions as well
            mex.printStackTrace();
        }
    }
}//End of class
 
 

When i try to compile the above code , i get the following compilation error.

  
javax.mail.SendFailedException: Sending failed;
  nested exception is: 
javax.mail.MessagingException: Could not connect to SMTP host: 172.27.165.255, port: 25;
  nested exception is: 
java.net.SocketException: Software caused connection abort: connect
at javax.mail.Transport.send0(Transport.java:219)
at javax.mail.Transport.send(Transport.java:81)
at TestEmail.main(TestEmail.java:49)
 

I can not understand why this error is coming.i manually tested the connectivity with our mail server using ping utility.But i am not sure why i am not able to connect to port 25(SMTP) . Can any body predict why this error is coming and suggest a solution?

[Jignesh Patel]

Your code is correct.
You need to talk to admin person to check whether your machine is allowed to send mail.

[Paul Sturrock]

i manually tested the connectivity with our mail server using ping utility.But i am not sure why i am not able to connect to port 25(SMTP)

Can you telnet to that machine on that port?

[Saravanan Thirugnanam]

Can you telnet to that machine on that port

No, when i try to telnet to that machine on port 25 , it is not connected.But if i use ping utility to test connection with that machine it is giving reply.

My machine is connected to internet through proxy server.Is this a problem in sending mail?

[Ulf Dittmer]

Ping just checks that the machine is up and running, and listening to the network. If you can't connect to port 25, that port may be blocked somewhere in between, or the mail server is down or doesn't accept connections from the machine you're trying this from.
You said that your mail client running on the same machine does not have problems connecting to that machine? That would be odd indeed.

[Saravanan Thirugnanam]

You said that your mail client running on the same machine does not have problems connecting to that machine?

yes, A mail client(Lotus Notes) is running in the same machine which is connected to that machine through which we send and receive our corporate mails. But i can not programmatically connect to that machine on port 25.
Do i need to do any configuration in mail server to accept connection from my machine or is there any problem in sending mails from a system which is behind the firewalls?

[Paul Sturrock]

Check your Notes client configuration. Somewhere it is likely to describe its connection parameters (sorry, can't suggest where - I haven't used Notes in six years). Perhaps you are connecting to the wrong machine, or there are extra authentication steps needed.

(Long shot: make sure your email server is running Domino 4.5 or above, previous versions didn't support SMTP)

[Seetesh Hindlekar]

Hello,

The port 25 is usually blocked by the SMTP/POP3 server and checkbox is usually set. Tell your Administrator to uncheck this. Normally this port is blocked as part of the 6 port blocking rules as set in the virusscan console of the POP3/SMTP Server for your IP address/machine.

Even if you uncheck the box, it re-checks the status of blocking this port after a pre-determined time.

The process has to be repeated after every "n" hours or so.

Rgds,

Seetesh

[Malin Ljungh]

Hi,

I have the exact same problem.
I have also verified that I can send email through my SMTP server on port 25 using Outlook - but not programatically using Java :-(

Did you solve this?