📧 SMTP Tester

A modern, multilingual SMTP server testing tool with detailed debug output.

🔗 Live Demo

Try it now → https://www.bugra.work/smtp-tester

✨ Features

🌍 21 Languages - Support for the world's most spoken languages with automatic browser detection
🔍 Detailed Debug Output - Terminal-style step-by-step SMTP communication log
🔒 Secure Connections - TLS/SSL encryption support
🎨 GitHub-Style UI - Modern dark theme inspired by GitHub's design
📱 Responsive - Works on desktop and mobile devices
⚡ Real-time - AJAX-based instant results

🚀 Quick Start

Requirements

PHP 7.4 or higher
Web server (Apache, Nginx, etc.)
sockets PHP extension (usually enabled by default)

Installation

Clone the repository:

git clone https://github.com/bugraskl/smtp-tester.git

Move to your web server directory:

cp -r smtp-tester /var/www/html/
# or for XAMPP on Windows:
# copy smtp-tester C:\xampp\htdocs\

Open in your browser:

http://localhost/smtp-tester/

📋 Usage

Enter your SMTP server details:
- Host: Your SMTP server address (e.g., smtp.gmail.com)
- Port: SMTP port (25, 465, or 587)
- Encryption: None, TLS, or SSL
- Username/Password: Optional authentication credentials
Click Test SMTP Connection
View the detailed debug output showing each step of the SMTP handshake

🌐 Supported Languages

Language	Code	Language	Code
🇬🇧 English	en	🇻🇳 Tiếng Việt	vi
🇨🇳 中文	zh	🇹🇷 Türkçe	tr
🇮🇳 हिन्दी	hi	🇵🇱 Polski	pl
🇪🇸 Español	es	🇺🇦 Українська	uk
🇸🇦 العربية	ar	🇳🇱 Nederlands	nl
🇧🇩 বাংলা	bn	🇮🇩 Bahasa Indonesia	id
🇧🇷 Português	pt	🇹🇭 ไทย	th
🇷🇺 Русский	ru	🇮🇷 فارسی	fa
🇯🇵 日本語	ja
🇩🇪 Deutsch	de
🇫🇷 Français	fr
🇰🇷 한국어	ko
🇮🇹 Italiano	it

📁 Project Structure

smtp-tester/
├── index.php              # Main application page
├── README.md              # This file
├── api/
│   └── test.php           # SMTP test API endpoint
├── assets/
│   ├── css/
│   │   └── style.css      # GitHub-style dark theme
│   └── js/
│       └── app.js         # Frontend JavaScript
├── includes/
│   ├── config.php         # Configuration
│   ├── functions.php      # Helper functions
│   └── SmtpTester.php     # SMTP testing class
└── languages/
    ├── en.php             # English
    ├── tr.php             # Turkish
    └── ...                # Other languages

🔧 Common SMTP Servers

Provider	Host	Port	Encryption
Gmail	smtp.gmail.com	587	TLS
Outlook	smtp.outlook.com	587	TLS
Yahoo	smtp.mail.yahoo.com	587	TLS
Yandex	smtp.yandex.com	465	SSL

⚠️ Note: For Gmail, you need to use an App Password if 2FA is enabled.

🤝 Contributing

Contributions are welcome! Feel free to:

Fork the repository
Create a feature branch (git checkout -b feature/amazing-feature)
Commit your changes (git commit -m 'Add amazing feature')
Push to the branch (git push origin feature/amazing-feature)
Open a Pull Request

Adding a New Language

Copy languages/en.php to languages/xx.php (where xx is the language code)
Translate all strings in the new file
Add the language to $SUPPORTED_LANGUAGES in includes/config.php

📄 License

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

🙏 Acknowledgments

UI design inspired by GitHub
Icons from native emoji set

Made with ❤️ by developers, for developers

Smtp Tester