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

Question

Here is the code of the application. I have been trying to run this using eclipse IDE. I also added all the required java mail jar files namely dsn.jar,imap.jar,mailapi.j

Answer 1

Email succeeded through Gmail using JDK 7 with below Gmail settings.

Go to Gmail Settings > Accounts and Import > Other Google Account settings > and under Sign-in & security

1. 2-Step Verification: Off
2. Allow less secure apps: ON
3. App Passwords: 1 password (16 characters long), later replaced the current password with this.

used following maven dependencies:

spring-core:4.2.2
spring-beans:4.2.2
spring-context:4.2.2
spring-context-support:4.2.2
spring-expression:4.2.2
commons-logging:1.2


    javax.mail
    mail
    1.4.7

and my source code is:

import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import javax.swing.JOptionPane;
import java.util.List;
import java.util.Properties;

public class Email {

    public final void prepareAndSendEmail(String htmlMessage, String toMailId) {

        final OneMethod oneMethod = new OneMethod();
        final List resourceList = oneMethod.getValidatorResource();

        //Spring Framework JavaMailSenderImplementation    
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost("smtp.gmail.com");
        mailSender.setPort(465);

        //setting username and password
        mailSender.setUsername(String.valueOf(resourceList.get(0)));
        mailSender.setPassword(String.valueOf(resourceList.get(1)));

        //setting Spring JavaMailSenderImpl Properties
        Properties mailProp = mailSender.getJavaMailProperties();
        mailProp.put("mail.transport.protocol", "smtp");
        mailProp.put("mail.smtp.auth", "true");
        mailProp.put("mail.smtp.starttls.enable", "true");
        mailProp.put("mail.smtp.starttls.required", "true");
        mailProp.put("mail.debug", "true");
        mailProp.put("mail.smtp.ssl.enable", "true");
        mailProp.put("mail.smtp.user", String.valueOf(resourceList.get(0)));

        //preparing Multimedia Message and sending
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        try {
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
            helper.setTo(toMailId);
            helper.setSubject("I achieved the Email with Java 7 and Spring");
            helper.setText(htmlMessage, true);//setting the html page and passing argument true for 'text/html'

            //Checking the internet connection and therefore sending the email
            if(OneMethod.isNetConnAvailable())
                mailSender.send(mimeMessage);
            else
                JOptionPane.showMessageDialog(null, "No Internet Connection Found...");
        } catch (MessagingException e) {
            e.printStackTrace();
        }

    }

}

Hope this will help someone.