Categories: JavaMail

Send an Email via Gmail SMTP

We can send email by using the SMTP server of gmail. It is good if you are don’t have any SMTP server and reliable. Here we will learn how to send email through gmail server by SSL (Secured Socket Layer). SSL is basically used for security if you are sending email through gmail server.

Send an Email via Gmail SMTP

For sending the email using JavaMail API, you need to load the two jar files:

  • mail.jar
  • activation.jar
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 SendMailSSL {
 public static void main(String[] args) {
  Properties props = new Properties();
  props.put("mail.smtp.host", "smtp.gmail.com");
  props.put("mail.smtp.socketFactory.port", "465");
  props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
  props.put("mail.smtp.auth", "true");
  props.put("mail.smtp.port", "465");
  final String username="dineshonjava";
  final String password="******";//Change accordingly
  Session session = Session.getDefaultInstance(props,
   new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
     return new PasswordAuthentication(username,password);
    }
   });
 
  try {
 
   Message message = new MimeMessage(session);
   message.setFrom(new InternetAddress("dineshonjava@gmail.com"));
   message.setRecipients(Message.RecipientType.TO,InternetAddress.parse("admin@dineshonjava.com"));
   message.setSubject("Welcome Mail Tutorial!!!");
   message.setText("Dear User," +
     "nn This mail tutorial really nice, please try it!!!");
 
   Transport.send(message);
 
   System.out.println("Mail sent successfully!!!");
 
  } catch (MessagingException e) {
   throw new RuntimeException(e);
  }
 }
}

As you can see in the above example, userid and password need to be authenticated. As, this program illustrates, you can send email easily but change the username and password accordingly. Let’s see how to run it once again by simple technique-

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Dinesh Rajput

Dinesh Rajput is the chief editor of a website Dineshonjava, a technical blog dedicated to the Spring and Java technologies. It has a series of articles related to Java technologies. Dinesh has been a Spring enthusiast since 2008 and is a Pivotal Certified Spring Professional, an author of a book Spring 5 Design Pattern, and a blogger. He has more than 10 years of experience with different aspects of Spring and Java design and development. His core expertise lies in the latest version of Spring Framework, Spring Boot, Spring Security, creating REST APIs, Microservice Architecture, Reactive Pattern, Spring AOP, Design Patterns, Struts, Hibernate, Web Services, Spring Batch, Cassandra, MongoDB, and Web Application Design and Architecture. He is currently working as a technology manager at a leading product and web development company. He worked as a developer and tech lead at the Bennett, Coleman & Co. Ltd and was the first developer in his previous company, Paytm. Dinesh is passionate about the latest Java technologies and loves to write technical blogs related to it. He is a very active member of the Java and Spring community on different forums. When it comes to the Spring Framework and Java, Dinesh tops the list!

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