Spring

Gmail users can use Gmail’s SMTP server smtp.gmail.com to send emails from their Spring Boot apps. For this let us do some setup in the app:

1. Provide SMTP connection properties in the application.properties file:

   spring.mail.host=smtp.gmail.com
   spring.mail.username=<your gmail/google app email>
   spring.mail.password=*****
   spring.mail.port=587
   spring.mail.properties.mail.smtp.starttls.enable=true
   spring.mail.properties.mail.smtp.auth=true
   spring.mail.properties.mail.smtp.starttls.required=true

2. Use Spring Boot Email tools library – which is a wrapper over Spring Boot Email starter library.  Add the following in your pom.xml:

   <dependency>
       <groupId>it.ozimov</groupId>
       <artifactId>spring-boot-email-core</artifactId>
       <version>0.6.3</version>
   </dependency>

3. Annotation your application’s main class (i.e class annotated with @SpringBootApplication) with @EnableEmailTools:

   @SpringBootApplication
   @EnableEmailTools
   public class EmailApplication {
       public static void main(String[] args){
           SpringApplication.run(EmailApplication.class, args);
       }
   }

4. Let’s write a test which uses it.ozimov.springboot.mail.service.EmailService bean to send an email:

   @RunWith(SpringRunner.class)
   @SpringBootTest
   public class EmailServiceTest {
       @Autowired 
       it.ozimov.springboot.mail.service.EmailService emailService; 
   
       @Value("${spring.mail.username}") String fromEmail; 
       @Test 
       public void testSendEmail() throws UnsupportedEncodingException { 
           User user = new User(); 
           user.setEmail("sanaulla123@gmail.com"); 
           user.setDisplayName("Mohamed Sanaulla"); 
           final Email email = DefaultEmail.builder() 
               .from(new InternetAddress(fromEmail, "From Name"))
               .to(Lists.newArrayList(new InternetAddress(
                   user.getEmail(), user.getDisplayName()))) 
               .subject("Testing email")
               .body("Testing body ...")
               .encoding("UTF-8").build();
           emailService.send(email); 
       }
   }

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