Sending Email with Multiple Attachments using Amazon SES in Java Spring Boot

In this example, you will learn how to send a plain-text or HTML-based email with multiple attachments using Amazon SES in Java Spring Boot.

Follow these steps to achieve this:

  1. Setting up Amazon SES:
    • Login to the AWS Management Console and open the AWS SES console at https://console.aws.amazon.com/ses.
    • Create identity.
    • Verify your email address with Amazon SES.
    • Get your AWS credentials.
  2. Adding Dependency:

    3. Add Java SDK for Amazon SES dependency to your project from maven.

    For Maven:

    <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-ses</artifactId>
    <version>1.12.564</version>
</dependency>

    For Gradle:

    implementation 'org.springframework.boot:spring-boot-starter-mail'
implementation group: 'com.amazonaws', name: 'aws-java-sdk-ses', version: '1.12.564'
  3. Adding Configuration:

    4. Create a class named AwsConfig and annotate it with @Configuration annotation. Add a method that returns an instance of AmazonSimpleEmailService class and annotate it with @Bean annotation. The following code shows how to do so:

    package com.example.app.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.simpleemail.AmazonSimpleEmailService;
import com.amazonaws.services.simpleemail.AmazonSimpleEmailServiceClientBuilder;

@Configuration
public class AwsConfig {

  public AWSStaticCredentialsProvider awsCredentials() {
    BasicAWSCredentials credentials =
        new BasicAWSCredentials("your-aws-access-key", "your-aws-access-secret");
    return new AWSStaticCredentialsProvider(credentials);
  }

  @Bean
  public AmazonSimpleEmailService getAmazonSimpleEmailService() {
    return AmazonSimpleEmailServiceClientBuilder.standard().withCredentials(awsCredentials())
        .withRegion("us-east-1").build();
  }
}
  4. Creating a Method for Sending an Email with Multiple Attachments:

    5. The following code demonstrates how to send an email with multiple attachments using Amazon SES in Java:

    Note: HTML based email content only support inline style css.

    package com.example.app.aws.ses;

import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.amazonaws.services.simpleemail.AmazonSimpleEmailService;
import com.amazonaws.services.simpleemail.model.RawMessage;
import com.amazonaws.services.simpleemail.model.SendRawEmailRequest;
import jakarta.activation.DataHandler;
import jakarta.activation.DataSource;
import jakarta.activation.FileDataSource;
import jakarta.mail.Message.RecipientType;
import jakarta.mail.Session;
import jakarta.mail.internet.MimeBodyPart;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeMultipart;

@Component
public class EmailService3 {

  @Autowired
  public AmazonSimpleEmailService amazonSimpleEmailService;


  public void sendEmailWithMultipleAttachments() {

    Session session = Session.getInstance(new Properties(System.getProperties()));
    MimeMessage mimeMessage = new MimeMessage(session);
    String emailContent =
        "<!DOCTYPE html>\n" + "<html lang=\"en\">\n" + "<head>\n" + "    <meta charset=\"utf-8\">\n"
            + "    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n"
            + "    <title>Example HTML Email with multiple attachents</title>\n" + "</head>\n"
            + "<body style=\"background: whitesmoke; padding: 30px; height: 100%\">\n"
            + "<h5 style=\"font-size: 18px; margin-bottom: 6px\">Dear example,</h5>\n"
            + "<p style=\"font-size: 16px; font-weight: 500\">Greetings from TutorialsBuddy</p>\n"
            + "<p>This is a simple html based email with multiple attachments.</p>\n" + "</body>\n"
            + "</html>";
    // link to files
    String filePath1 = "C:\\Users\\documents\\java-tutorials.pdf";
    String filePath2 = "C:\\Users\\documents\\python-tutorials.pdf";
    String filePath3 = "C:\\Users\\documents\\react-tutorials.pdf";
    String filePath4 = "C:\\Users\\documents\\php-tutorials.pdf";
    List<String> files = new ArrayList<>();
    files.add(filePath1);
    files.add(filePath2);
    files.add(filePath3);
    files.add(filePath4);

    try {
      mimeMessage.setSubject("Test Email", "UTF-8");

      mimeMessage.setFrom("example@tutorialsbuddy.com");
      mimeMessage.setRecipients(RecipientType.TO, "receiver@gmail.com");

      MimeMultipart msgBody = new MimeMultipart("alternative");
      MimeBodyPart wrap = new MimeBodyPart();
      MimeBodyPart htmlPart = new MimeBodyPart();
      htmlPart.setContent(emailContent, "text/html; charset=UTF-8");
      msgBody.addBodyPart(htmlPart);
      wrap.setContent(msgBody);

      MimeMultipart msg = new MimeMultipart("mixed");
      mimeMessage.setContent(msg);
      msg.addBodyPart(wrap);

      // Add multiple files to attachment
      for (int i = 0; files.size() > i; i++) {
        MimeBodyPart messageBodyPart = new MimeBodyPart();

        DataSource source = new FileDataSource(files.get(i));
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName("file" + i + ".pdf");

        msg.addBodyPart(messageBodyPart);
      }


      ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
      mimeMessage.writeTo(outputStream);
      RawMessage rawMessage = new RawMessage(ByteBuffer.wrap(outputStream.toByteArray()));

      SendRawEmailRequest rawEmailRequest = new SendRawEmailRequest(rawMessage);
      amazonSimpleEmailService.sendRawEmail(rawEmailRequest);
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }

}