Send Email Using Java

In this tutorial, I am showing how to send an email using JavaMail Api. Sending email is a required use case for every project.

Here I am using gmail host( smtp.gmail.com) and gmail username and password for authentication. For a bigger projects, you have to use paid mail service provider and they will provide the required information like host and port parameters.

Here I am explaining following topics with complete examples

a) Sending plain text Email with JavaMail API

b) Sending HTML email with JavaMail API

c) Sending email attachment with JavaMail API

Dependency

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.javatips</groupId>
	<artifactId>javatips.net</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<dependencies>
		<dependency>
			<groupId>javax.mail</groupId>
			<artifactId>mail</artifactId>
			<version>1.5.0-b01</version>
		</dependency>
	</dependencies>
</project>

a) Sending Plain text Email with JavaMail API

package com.javatips;

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;

public class SendEmail {

    public static void main(String[] args) {
	String from = "from@gmail.com";
	String pass = "password";
	String[] toAddress = new String[]{"to@gmail.com"};
	String subject = "Java Mail Example";
	String body = "Hi, how are you";

	Properties properties = System.getProperties();
	String host = "smtp.gmail.com";

	properties.put("mail.smtp.starttls.enable", "true");

	properties.put("mail.smtp.ssl.trust", host);
	properties.put("mail.smtp.user", from);
	properties.put("mail.smtp.password", pass);
	properties.put("mail.smtp.port", "587");
	properties.put("mail.smtp.auth", "true");

	Session session = Session.getDefaultInstance(properties);
	MimeMessage message = new MimeMessage(session);

	try {

	    message.setFrom(new InternetAddress(from));
	    InternetAddress[] internetAddress = new InternetAddress[toAddress.length];

	    // iterate array of addresses
	    for (int i = 0; i < toAddress.length; i++) {
		internetAddress[i] = new InternetAddress(toAddress[i]);
	    }

	    for (int i = 0; i < internetAddress.length; i++) {
		message.addRecipient(Message.RecipientType.TO, internetAddress[i]);
	    }

	    message.setSubject(subject);
	    message.setText(body);

	    Transport transport = session.getTransport("smtp");

	    transport.connect(host, from, pass);
	    transport.sendMessage(message, message.getAllRecipients());
	    transport.close();

	} catch (AddressException ae) {
	    ae.printStackTrace();
	} catch (MessagingException me) {
	    me.printStackTrace();
	}
    }

}

b) Sending HTML email with JavaMail API

package com.javatips;

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;

public class SendHTMLEmail {

   public static void main(String[] args) {
	String from = "from@gmail.com";
	String pass = "password";
	String[] toAddress = new String[]{"to@gmail.com"};
	String subject = "Java Mail Example";
	String body = "<b>This is an example for HTML example</b>";

	Properties properties = System.getProperties();
	String host = "smtp.gmail.com";

	properties.put("mail.smtp.starttls.enable", "true");

	properties.put("mail.smtp.ssl.trust", host);
	properties.put("mail.smtp.user", from);
	properties.put("mail.smtp.password", pass);
	properties.put("mail.smtp.port", "587");
	properties.put("mail.smtp.auth", "true");

	Session session = Session.getDefaultInstance(properties);
	MimeMessage message = new MimeMessage(session);

	try {

	    message.setFrom(new InternetAddress(from));
	    InternetAddress[] internetAddress = new InternetAddress[toAddress.length];

	    // iterate array of addresses
	    for (int i = 0; i < toAddress.length; i++) {
		internetAddress[i] = new InternetAddress(toAddress[i]);
	    }

	    for (int i = 0; i < internetAddress.length; i++) {
		message.addRecipient(Message.RecipientType.TO, internetAddress[i]);
	    }
	    
	    message.setSubject(subject);
	    message.setContent(body, "text/html");

	    Transport transport = session.getTransport("smtp");

	    transport.connect(host, from, pass);
	    transport.sendMessage(message, message.getAllRecipients());
	    transport.close();

	} catch (AddressException ae) {
	    ae.printStackTrace();
	} catch (MessagingException me) {
	    me.printStackTrace();
	}
    }

}

c) Sending email attachment with JavaMail API

package com.javatips;

import java.util.*;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;

public class SendAttachmentEmail {

    public static void main(String[] args) {
	String from = "from@gmail.com";
	String pass = "password";
	String[] toAddress = new String[] { "to@gmail.com" };
	String subject = "Java Mail Example";
	String body = "Hi, how are you";

	Properties properties = System.getProperties();
	String host = "smtp.gmail.com";

	properties.put("mail.smtp.starttls.enable", "true");

	properties.put("mail.smtp.ssl.trust", host);
	properties.put("mail.smtp.user", from);
	properties.put("mail.smtp.password", pass);
	properties.put("mail.smtp.port", "587");
	properties.put("mail.smtp.auth", "true");

	Session session = Session.getDefaultInstance(properties);
	MimeMessage message = new MimeMessage(session);

	try {

	    message.setFrom(new InternetAddress(from));
	    InternetAddress[] internetAddress = new InternetAddress[toAddress.length];

	    // iterate array of addresses
	    for (int i = 0; i < toAddress.length; i++) {
		internetAddress[i] = new InternetAddress(toAddress[i]);
	    }

	    for (int i = 0; i < internetAddress.length; i++) {
		message.addRecipient(Message.RecipientType.TO, internetAddress[i]);
	    }

	    message.setSubject(subject);
	    message.setText(body);

	    MimeBodyPart messageBodyPart = new MimeBodyPart();
	    Multipart multipart = new MimeMultipart();
	    String file = "exact path of file to be attached";
	    String fileName = "attachmentName";
	    DataSource source = new FileDataSource(file);
	    messageBodyPart.setDataHandler(new DataHandler(source));
	    messageBodyPart.setFileName(fileName);
	    multipart.addBodyPart(messageBodyPart);
	    message.setContent(multipart);

	    Transport transport = session.getTransport("smtp");

	    transport.connect(host, from, pass);
	    transport.sendMessage(message, message.getAllRecipients());
	    transport.close();

	} catch (AddressException ae) {
	    ae.printStackTrace();
	} catch (MessagingException me) {
	    me.printStackTrace();
	}
    }

}