How to send email using Spring Boot using Java Mail sender SMTP | A Step by Step Guide | Code Decode

In this tutorial of code decode we have demonstrate sending email using spring boot java mail sender smtp
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To send emails through the Spring boot application we have many ways
1) JavaMailSender
Spring** **Boot provides the ability to send emails via SMTP using the [JavaMail](docs.spring.io...) Library. You may send an email with Gmail transport layer security by utilizing the spring boot restful web API.
The general steps to generate a password from Gmail are as follows:
- [ ] Go to Gmail and click Manage your account.
- [ ] Go to security and turn on the 2-step verification
- [ ] They will need your mobile number to generate a one-time code for verification. Provide one and give the code they sent to the registered mobile number.
- [ ] Now go to the following link [myaccount.google.com/apppasswords](myaccount.goog...)
- [ ] It might ask you to verify yourself again.
- [ ] Once done they will navigate you to the App passwords page where they will ask you to create a new app-specific password, so first add the app name then add the password.
- [ ] As soon as you click on Create, a password will be autogenerated.
- [ ] Use this password in your properties file.
Why not a normal password?
If you add your Gmail password, it will not work. By generating an app password specifically for your Spring Boot application, you adhere to security best practices, reduce the risk of unauthorized access, and maintain better control over access to your Gmail account.
The advantages of this way of sending email:
1. *Control:* JavaMailSender is a part of the Spring Framework and provides direct control over the email-sending process within your Spring Boot application. You're not reliant on an external service.
2. *Customization:* With JavaMailSender, you have more control over the email content and formatting. You can customize emails according to your specific requirements without being limited by the features provided by an external service.
3. *Cost:* Since JavaMailSender is part of the Spring Framework, there are no additional costs associated with using it. It's a self-hosted solution, which can be more cost-effective for applications with lower email volumes.
Disadvantages:
1. *Configuration:* Setting up and configuring JavaMailSender in Spring Boot may require more effort compared to integrating with a service like SendGrid. You need to handle SMTP server configuration, security settings, and other technical aspects.
2. *Deliverability:* Ensuring high deliverability rates with JavaMailSender can be challenging, especially when sending a large volume of emails. You need to manage your SMTP server reputation and adhere to email best practices to avoid being flagged as spam.
3. *Scalability:* While JavaMailSender is suitable for smaller applications or projects with moderate email traffic, it may not scale as effectively as dedicated email delivery services like SendGrid for handling large volumes of emails.
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