Example of sending email in Java using Gmail SMTP

By Atul Rai | Last Updated: July 14, 2020 Previous       Next

This Java tutorial will explain how to send an email through Java program using Gmail server and JavaMail API. JavaMail API provides a platform-independent and protocol-independent framework to build mail and messaging applications.

Required Library: In this example, you need to add below libraries in your project build path or set to the classpath.

1. mail-1.4.jar
2. javaee.jar

<dependencies>
	<dependency>
		<groupId>javax.mail</groupId>
		<artifactId>mail</artifactId>
		<version>1.4</version>
	</dependency>
	<dependency>
		<groupId>javax</groupId>
		<artifactId>javaee-api</artifactId>
		<version>7.0</version>
	</dependency>
</dependencies>

Note: You may face the javax.mail.AuthenticationFailedException exception. To resolve this check this tutorial javax.mail.AuthenticationFailedException

package org.websparrow;

import java.util.Properties;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SendEmail {
	public static void main(String[] args) {
		final String username = "[email protected]";
		final String password = "sender_email_password";

		// setting gmail smtp properties
		Properties props = new Properties();
		props.put("mail.smtp.auth", "true");
		props.put("mail.smtp.starttls.enable", "true");
		props.put("mail.smtp.host", "smtp.gmail.com");
		props.put("mail.smtp.port", "587");

		// check the authentication
		Session session = Session.getInstance(props, new javax.mail.Authenticator() {
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication(username, password);
			}
		});

		try {

			Message message = new MimeMessage(session);
			message.setFrom(new InternetAddress("[email protected]"));

			// recipients email address
			message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("[email protected]"));

			// add the Subject of email
			message.setSubject("JavaMail API Test");

			// message body
			message.setText("This is a test mail only");// message

			Transport.send(message);

			System.out.println("Email Sent Successfully");

		} catch (MessagingException e) {
			throw new RuntimeException(e);

		}
	}
}