Send emails with Spring by using Java annotations

Question

How could I send an email with Spring 4 (and Spring Boot) by using a pure annotation-based approach (according to the Java Configurations

Answer 1

In pom.xml:

    org.springframework.boot
    spring-boot-starter-mail

In application.properties:

spring.mail.host=...
spring.mail.port=...

In Foo.java:

@Component
public class Foo {

    @Autowired
    private JavaMailSender mailSender;

    public void send() {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom("foo@example.com");
        message.setTo("bar@example.com");
        message.setSubject("hello");
        mailSender.send(message);
    }
}

Personally, I recommend running a localhost MTA, and using it to relay to your real MTA (like Gmail or SES, or your own). This gives you a "free" asynchronous queue, and centralizes config. I like OpenSMTP.