README.md

Email Verifier CLI

A simple CLI tool built with Go to verify email addresses by checking their format, domain validity, and reachability.

Features

• Validate email format using regex.
• Check if the email domain has valid MX records.
• Verify the reachability of the email via SMTP.
• Interactive CLI using Bubble Tea.

Prerequisites

• Go 1.18+

Installation

Clone the repository:

git clone https://github.com/ayushsarode/email-verifier.git
cd email-verifier/cli

Install dependencies:

go mod tidy

Usage

Run the CLI tool:

go run main.go verify --email your-email@example.com

Example output:

[1/3] Checking email format...
[2/3] Checking domain validity...
[3/3] Checking email reachability...
✅ Email your-email@example.com is valid and reachable!

Project Structure

email-verifier/
  └── cli/
      ├── cmd/
      │   ├── root.go
      │   ├── verify.go
      ├── internal/
      │   ├── validator_test.go
      │   ├── validator.go
      ├── main.go
      ├── go.mod
      ├── go.sum

Commands

Verify an email

go run main.go verify --email=your-email@example.com

Flags

• --email or -e: The email address to be verified.

Error Handling

Common errors handled:

• Invalid email format.
• Invalid domain without MX records.
• Unreachable email via SMTP.

Testing

Run unit tests with:

go test ./...

License

This project is licensed under the MIT License.

Contribution

Feel free to submit issues or pull requests to enhance the project.