📧 Spring Boot Email Sender

A simple Spring Boot application to send emails using Gmail SMTP.
This project demonstrates how to send emails to one or multiple recipients using Spring Boot Mail Starter.

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🚀 Features

• Send email using REST API
• Supports single or multiple recipients
• Uses Gmail SMTP with App Password
• Input validation
• Exception handling
• Simple and clean architecture

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🛠️ Tech Stack

• Java
• Spring Boot
• Spring Boot Starter Mail
• REST API
• Maven

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⚙️ Configuration

1️⃣ Gmail App Password Setup

To send emails using Gmail, you must generate an App Password.

Steps:

1. Enable 2-Step Verification in your Google Account
2. Go to 👉 https://myaccount.google.com/apppasswords
3. Select:
   • App: Mail
   • Device: Other (SpringBoot)
4. Generate and copy the 16-character App Password

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2️⃣ application.properties

spring.mail.host=smtp.gmail.com
spring.mail.port=587

spring.mail.username=yourgmail@gmail.com
spring.mail.password=YOUR_APP_PASSWORD

spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true

Thank you