Send email via smtp.gmail in Spring Faremework

Question

I am working on sending the email via smtp.gmail in Spring boot.

EmailConfig.java

@Configuration
public class EmailConfig
{
    @Bean
    public JavaMailSender getJavaMailSender()
    {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost("smtp.gmail.com");
        mailSender.setPort(25);

        mailSender.setUsername("[email protected]");
        mailSender.setPassword("123");

        Properties props = mailSender.getJavaMailProperties();
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.debug", "true");

        return mailSender;
    }

    @Bean
    public SimpleMailMessage emailTemplate()
    {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setTo("[email protected]");
        message.setFrom("[email protected]");
        message.setText("FATAL - Application crash. Save your job !!");
        return message;
    }
}

SendEmailService.java

@Service("emailService")
public class SendEmailService {

    @Autowired
    JavaMailSender mailSender;

    @Autowired
    private SimpleMailMessage preConfiguredMessage;

    public void sendPreConfiguredMail(String message)
    {
        SimpleMailMessage mailMessage = new SimpleMailMessage(preConfiguredMessage);
        mailMessage.setText(message);
        mailSender.send(mailMessage);
    }
}

Error : I have received an email on my account "Sign-in attempt was blocked" Someone just used your password to try to sign in to your account from a non-Google app. Google blocked them, but you should check what happened. Review your account activity to make sure no one else has access

How to figure out this.

Answer 1

1. Go to gmail.com
2. Click on your profile picture and goto Manage Your account
3. On the new page, go to the Security tab
   
4. Scroll down and turn-on less secure app access
   
5. Confirm the access in your email(optional, sometimes needed only)

Answer 2

just go to your account security and allow less secure apps to "ON"