{
    "status": "online",
    "service": "Syntherion Mail Sender API",
    "version": "1.0.0",
    "smtp": {
        "host": "smtp.larksuite.com",
        "port": 465,
        "encryption": "ssl",
        "sender": "contact@syntherion.co.id"
    },
    "auth_mode": "API_KEY_REQUIRED",
    "endpoints": {
        "POST /": "Send email (accepts text_file upload or file_path)",
        "POST /?preview=true": "Render and preview HTML template without sending",
        "GET  /?test_smtp=true": "Check SMTP server connectivity and authentication",
        "GET  /preview.php": "Visual browser template previewer"
    },
    "timestamp": "2026-10-10T21:58:28+00:00"
}