title: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender
body: <p>I was trying to use spring boot to send email. However, I always get the warning of NoSuchBeanDifinition found. I know javaemailsender is an reference from the imported API, which is not a class with @Bean. Can anyone help me with that?</p>
  
  <pre><code>@RestController
  public class SignUpController {
  
      @Autowired
      private UserRepository repo;
  
      @Autowired
      private SendingEmails sendingEmail;
  
      @RequestMapping(method = RequestMethod.POST, value = "/signup")
      public @ResponseBody
      Object create(@Valid @RequestBody User user, BindingResult result, Errors error) throws MessagingException {
          //Check the result, if error, return error and don't add user
          System.out.println("Result: " + result);
          if (result.hasErrors()) {
              FieldError fieldError = result.getFieldError();
              if (fieldError.getField().equals("email")) {
                  throw new DuplicateEmailException();
              }
              //Lazy Else
              throw new DuplicateUsernameException();
          }
  
          User newUser = User.createUser(user.getUsername(), user.getEmail(), user.getPassword());
  
          //String emailMessage = "Thank you, you username is"+user.getUsername();
          sendingEmail.send("haha", "success of registration", "xy_jonathan@hotmail.com");
  
  
          return repo.save(newUser);
  
      }
  
  
  
      @ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "Email already exists")
      public class DuplicateEmailException extends RuntimeException {
      }
  
      @ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "Username already exists")
      public class DuplicateUsernameException extends RuntimeException {
      }
  }
  
  
  @Service
  public class SendingEmails {
  
      @Autowired
      private JavaMailSender javaMailSender;
  
      public void send(String subject, String to, String text) throws MessagingException{
          MimeMessage message = javaMailSender.createMimeMessage();
          MimeMessageHelper helper;
  
          helper = new MimeMessageHelper(message,true);
  
          helper.setSubject(subject);
          helper.setTo(to);
          helper.setText(text);
  
          javaMailSender.send(message);
      }
  }
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.badmap.model.SendingEmails com.badmap.controller.SignUpController.sendingEmail; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sendingEmails': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender com.badmap.model.SendingEmails.javaMailSender; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
      at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
      ... 16 more
  Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sendingEmails': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender com.badmap.model.SendingEmails.javaMailSender; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
      ... 18 more
  Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender com.badmap.model.SendingEmails.javaMailSender; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
      at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
      ... 29 more
  Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1301)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1047)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
      at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
      ... 31 more
  </code></pre>