Email Verification System

This project is an Email Verification System designed to integrate with account signup processes. It leverages Node.js and Express to verify if an email address belongs to a business domain or a known free email provider. The application also uses DNS MX record lookups to validate business email domains and includes rate limiting to prevent abuse.

Prerequisites

Before you begin, ensure you have met the following requirements:

• Node.js (v14.x or later)
• NPM (v6.x or later)

Installation

To install the Email Verification System, follow these steps:

1. Clone the repository:

   git clone https://github.com/your-username/your-project-name.git
   

2. Navigate into the project directory:

   cd

3. Install the dependencies:

   npm install

Usage

To start the server, run the following command in your terminal:

npm start

The server will start running on http://localhost:3001. You can adjust the port by setting the PORT environment variable in your environment or using a .env file.

Server-Side Functionality for Chain Hire DApp

The server side of the Heroku app enhances the Chain Hire DApp by managing user authentication, business email verification, and secure cookie handling. It interfaces with Firebase services to securely manage user data and authentication processes. Here are its key functionalities:

User Authentication and Management:

Utilizes Firebase Authentication for secure user sign-up and login processes.

Business Email Verification:

Verifies business email addresses to ensure they belong to legitimate domains.

Secure Cookies Middleware:

Enhances security by applying HttpOnly, Secure, and SameSite attributes to cookies.

Firebase Admin Integration:

Allows for server-side user management and interaction with Firebase Firestore for data storage.

Environment Variable Management:

Uses environment variables for secure configuration management.

Heroku Deployment:

Benefits from Heroku's robust infrastructure for reliable performance and scalability.

Endpoints

GET /: Displays a welcome message for the Email Verification Service.

POST /verify-email:

Accepts a JSON payload with an email field to verify if it's from a business domain. The response will indicate success or failure along with an appropriate message.

Example Request:

{
  "email": "user@example.com"
}

Example Response:

{
  "success": true,
  "message": "Valid business email domain"
}

Rate Limiting

Requests to the /verify-email endpoint are rate-limited to 100 requests per 15 minutes per IP address to prevent abuse. If the limit is exceeded, the server will respond with a 429 Too Many Requests status and a message to try again later.

Contributing

Contributions to the Email Verification System are welcome. Please follow the standard pull request process for your contributions.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Contact

If you have any questions or feedback, please reach out to the project maintainer at your-email@example.com.