In this article, we will discuss how to send an Email using Java Mail.
Spring Boot is used to setup dependencies.
This code can be used to send mail to any Email server or relay server including Gmail (as a standalone application).
POM configurations:
spring-boot-starter-mail contains all the basic jars required for this example.
Add the following dependencies in the pom.
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
</dependencies>
SendEmail class:
package com.codebonneamie.demo;
import java.io.IOException;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
class SendEmail
{
public static void main( String args[] )
{
SpringApplication.run( SendEmail.class, args );
}
@Override
public void run(String… args)
{
String fromEmailAddress = “noreply@gmail.com”;
String toEmailAddress = “to_user@gmail.com”;
String subject = “Codebonneamie Email test”;
String content = “Hi All, Have a nice day!!!\nRegards codebonneamie.com”;
//The Email address and password used for authentication
String authEmailAddress = “test@gmail.com”;
String authEmailPassword = “password”;
Properties properties = new Properties();
properties.put( “mail.smtp.host”, “smtp.gmail.com” );
properties.put( “mail.smtp.port”, “587” );
properties.put( “mail.smtp.auth”, “true” );
properties.put( “mail.smtp.starttls.enable”, “true” );
Session session = Session.getInstance( properties, new javax.mail.Authenticator()
{
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication( authEmailAddress, authEmailPassword );
}
});
//Set this to print debug logs in console
session.setDebug(true);
try
{
Message message = new MimeMessage( session );
Multipart multipart = new MimeMultipart();
message.setFrom( new InternetAddress( fromEmailAddress, false ) );
message.setRecipients( Message.RecipientType.TO, InternetAddress.parse( toEmailAddress ) );
message.setSubject( subject );
MimeBodyPart mimeBodyPartContent = new MimeBodyPart();
mimeBodyPartContent.setContent( content, “text/plain” );
multipart.addBodyPart( mimeBodyPartContent );
//This part is required only if Email attachments have to be added
MimeBodyPart mimeBodyPart = new MimeBodyPart();
mimeBodyPart.attachFile( “/user/test.pdf” );
multipart.addBodyPart( mimeBodyPart );
message.setContent( multipart );
Transport.send( message );
}
catch ( MessagingException | IOException e )
{
e.printStackTrace();
}
}
}
Run the application to send Email.
Multipart is not required if Email attachments doesn’t have to be added. Instead set the content to message object.
message.setContent( “<h6>Use text/html instead of text/plain if content contains HTML tags</h6>”, “text/html” );
Transport.send( message );