Java Mail need authentication, including send mail by Gmail

Sample of Java Mail need authentication

import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

import java.util.Properties;


public class SimpleMail {

    private static final String SMTP_HOST_NAME = "smtp.myserver.com";
    private static final String SMTP_AUTH_USER = "myusername";
    private static final String SMTP_AUTH_PWD  = "mypwd";

    public static void main(String[] args) throws Exception{
       new SimpleMail().test();
    }

    public void test() throws Exception{
        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.host", SMTP_HOST_NAME);
        props.put("mail.smtp.auth", "true");

        Authenticator auth = new SMTPAuthenticator();
        Session mailSession = Session.getDefaultInstance(props, auth);
        // uncomment for debugging infos to stdout
        // mailSession.setDebug(true);
        Transport transport = mailSession.getTransport();

        MimeMessage message = new MimeMessage(mailSession);
        message.setContent("This is a test", "text/plain");
        message.setFrom(new InternetAddress("me@myhost.org"));
        message.addRecipient(Message.RecipientType.TO,
             new InternetAddress("elvis@presley.org"));

        transport.connect();
        transport.sendMessage(message,
            message.getRecipients(Message.RecipientType.TO));
        transport.close();
    }

    private class SMTPAuthenticator extends javax.mail.Authenticator {
        public PasswordAuthentication getPasswordAuthentication() {
           String username = SMTP_AUTH_USER;
           String password = SMTP_AUTH_PWD;
           return new PasswordAuthentication(username, password);
        }
    }
}

Sample of sending mail by Gmail SMTPs

import javax.mail.*;
import javax.mail.internet.*;

import java.util.Properties;


public class SimpleSSLMail {

    private static final String SMTP_HOST_NAME = "smtp.gmail.com";
    private static final int SMTP_HOST_PORT = 465;
    private static final String SMTP_AUTH_USER = "myaccount@gmail.com";
    private static final String SMTP_AUTH_PWD  = "mypwd";

    public static void main(String[] args) throws Exception{
       new SimpleSSLMail().test();
    }

    public void test() throws Exception{
        Properties props = new Properties();

        props.put("mail.transport.protocol", "smtps");
        props.put("mail.smtps.host", SMTP_HOST_NAME);
        props.put("mail.smtps.auth", "true");
        // props.put("mail.smtps.quitwait", "false");

        Session mailSession = Session.getDefaultInstance(props);
        mailSession.setDebug(true);
        Transport transport = mailSession.getTransport();

        MimeMessage message = new MimeMessage(mailSession);
        message.setSubject("Testing SMTP-SSL");
        message.setContent("This is a test", "text/plain");

        message.addRecipient(Message.RecipientType.TO,
             new InternetAddress("elvis@presley.org"));

        transport.connect
          (SMTP_HOST_NAME, SMTP_HOST_PORT, SMTP_AUTH_USER, SMTP_AUTH_PWD);

        transport.sendMessage(message,
            message.getRecipients(Message.RecipientType.TO));
        transport.close();
    }
}

 

Settings for well known mail providers

Yahoo


Incoming Mail Server - pop.mail.yahoo.com (POP3 - port 110)


Outgoing Mail Server - smtp.mail.yahoo.com (SMPTP - port 25)


Google GMail


Incoming Mail Server - pop.gmail.com (POP3S SSL enabled, port 995)


Outgoing Mail Server - gmail.com (SMPTS SSL enabled, port 465)