Spring BootでGmailからメール送信する方法

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>

spring.mail.host=smtp.gmail.com
spring.mail.port=587
spring.mail.username=Gmailアドレスを記述
spring.mail.password=後述
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true

import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;

@SpringBootApplication
@EnableBatchProcessing
public class SampleApplication implements CommandLineRunner{

    @Autowired
    MailSender mailSender;
    
    public static void main(String[] args) {
        SpringApplication.run(SampleApplication.class, args);
    }
    
    @Override
    public void run(String... args) throws Exception {
        SimpleMailMessage msg = new SimpleMailMessage();
        msg.setFrom("送信元のアドレスを記述");
        msg.setTo("送信先のアドレスを記述");
        msg.setSubject("タイトルを記述");
        msg.setText("本文を記述");
        this.mailSender.send(msg);        
    }
}