Unable to send e-mail through Java

Question

After going through post provided for the same problem, I have written the following code. But I am getting the following exception :

javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 587; nested exception is: java.net.ConnectException: Connection timed out: connect

public static void main(String[] args) {

    String to = "[email protected]" // valid gmail address.     
    String from = "[email protected]"; // valid gmail address

    String host = "smtp.gmail.com";
    String password = "****"; // password of the gmaill acc used in from

    int port = 587;


    Properties properties = System.getProperties();
    properties.put("mail.smtp.starttls.enable", "true");
    properties.setProperty("mail.smtp.host",host );
    properties.setProperty("mail.smtp.user", from);
    properties.setProperty("mail.smtp.password", password);
    properties.setProperty("mail.smtp.port", "587");
    properties.setProperty("mail.smtp.auth", "true");
    Session session = Session.getDefaultInstance(properties,null);

    try {

        MimeMessage message = new MimeMessage(session);

        message.setFrom(new InternetAddress(from));

        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

        message.setSubject("Test Mail");

        message.setText("This is just a test mail generated");

       Transport transport = session.getTransport("smtp");
       transport.connect(host,from,password);
       InternetAddress[] addresses = new InternetAddress[1];
       addresses[0] = new InternetAddress(to);
       transport.sendMessage(message,addresses);


        System.out.println("Message Sent Successfully");
    }catch(MessagingException excp){
        System.out.println(excp);
    }

}

Can somebody tell mistake that I am doing. Is there any setting in my gmail account which needs to be set to use the gmail smtp server?

Answer 1

There is a connection problem. first check the connectivity to "smtp.gmail.com" .

Goto Command Prompt and run ping command as follows.

ping smtp.gmail.com

if you don't get the reply from server there may be firewall issue.