126 Email MCP Server

🚀 A powerful MCP (Model Context Protocol) server for sending emails via 126.com SMTP service. Perfect for AI assistants like Claude Desktop!

✨ Features

• 🔒 Secure email sending via 126.com SMTP with SSL/TLS
• 📧 Rich email support - HTML, plain text, CC, BCC
• 🤖 MCP Protocol ready - Works seamlessly with Claude Desktop and other MCP clients
• ⚡ Zero configuration - Works entirely via command line arguments
• 🎯 npx ready - No installation required, use directly with npx

🚀 Quick Start for Claude Desktop

1. Add to Claude Desktop Configuration

Edit your ~/.claude_desktop_config.json file:

{
  "mcpServers": {
    "126-email": {
      "command": "npx",
      "args": [
        "-y",
        "126-email-mcp-server",
        "--email-user", "[email protected]",
        "--email-password", "your-password-or-app-specific-password"
      ]
    }
  }
}

2. With Custom Settings

{
  "mcpServers": {
    "126-email": {
      "command": "npx",
      "args": [
        "-y",
        "126-email-mcp-server",
        "[email protected]",
        "--email-password=your-password-or-app-specific-password",
        "--from-name=Your Name",
        "--debug=false"
      ]
    }
  }
}

3. Restart Claude Desktop

After saving the configuration, restart Claude Desktop to load the MCP server.

📧 Available Tools in Claude

Once configured, Claude will have access to these email tools:

send_email

Send emails with rich content support:

• to (required): Recipient email address
• subject (required): Email subject
• text (optional): Plain text content
• html (optional): HTML content
• cc (optional): CC recipients (comma-separated)
• bcc (optional): BCC recipients (comma-separated)

verify_smtp_connection

Test your SMTP configuration:

• No parameters required
• Returns connection status and details

🔧 Configuration Parameters

Required Parameters

• --email-user <email> - Your 126.com email address
• --email-password <password> - Your 126.com password or app-specific password

Optional Parameters

• --debug <true|false> - Enable debug mode (default: false)
• --smtp-host <host> - SMTP server (default: smtp.126.com)
• --smtp-port <port> - SMTP port (default: 465)
• --smtp-secure <true|false> - Use SSL/TLS (default: true)
• --from-name <name> - Display name for sender
• --require-tls <true|false> - Require TLS (default: false)

🔐 126.com Email Setup

Step 1: Enable SMTP Service

1. Log into your 126.com email account
2. Go to Settings → POP3/SMTP/IMAP
3. Enable SMTP service
4. Note down the SMTP settings (usually smtp.126.com:465 with SSL)

Step 2: Get App-Specific Password (if using 2FA)

1. If you have 2-factor authentication enabled
2. Generate an app-specific password
3. Use this app-specific password instead of your regular password

Step 3: Test Configuration

npx 126-email-mcp-server --email-user [email protected] --email-password yourpass --help

🎯 Usage Examples

Basic MCP Configuration

{
  "mcpServers": {
    "126-email": {
      "command": "npx",
      "args": ["-y", "126-email-mcp-server", "--email-user", "[email protected]", "--email-password", "yourpass"]
    }
  }
}

Advanced MCP Configuration

{
  "mcpServers": {
    "126-email": {
      "command": "npx",
      "args": [
        "-y", "126-email-mcp-server",
        "[email protected]",
        "--email-password=yourpass",
        "--from-name=AI Assistant",
        "--debug=true",
        "--smtp-secure=true"
      ]
    }
  }
}

Alternative MCP Client Configuration

{
  "servers": {
    "126-email-server": {
      "command": "npx",
      "args": ["-y", "126-email-mcp-server", "--email-user", "[email protected]", "--email-password", "yourpass"],
      "env": {}
    }
  }
}

🧪 Testing Outside Claude

Interactive Mode

npx 126-email-mcp-server --email-user [email protected] --email-password yourpass

STDIO Mode (for MCP clients)

npx 126-email-mcp-server --stdio --email-user [email protected] --email-password yourpass

Configuration Check

npx 126-email-mcp-server --email-user [email protected] --email-password yourpass --help

🔍 Troubleshooting

Claude Desktop Not Recognizing the Server

1. Check configuration syntax - Ensure JSON is valid
2. Restart Claude Desktop - Required after config changes
3. Check credentials - Verify email and password are correct
4. Enable SMTP - Ensure SMTP is enabled in your 126.com account

Authentication Issues

1. Use app-specific password if 2FA is enabled
2. Check SMTP settings in your 126.com account
3. Try debug mode: Add --debug=true to see detailed logs

Connection Issues

1. Check firewall settings
2. Try different ports: 25, 465, 587
3. Verify SMTP host: Should be smtp.126.com

📋 Configuration File Locations

Claude Desktop

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

🚀 Advanced Usage

Multiple Email Accounts

{
  "mcpServers": {
    "126-email-personal": {
      "command": "npx",
      "args": ["-y", "126-email-mcp-server", "--email-user", "[email protected]", "--email-password", "pass1"]
    },
    "126-email-work": {
      "command": "npx",
      "args": ["-y", "126-email-mcp-server", "--email-user", "[email protected]", "--email-password", "pass2"]
    }
  }
}

Custom SMTP Settings

{
  "mcpServers": {
    "126-email-custom": {
      "command": "npx",
      "args": [
        "-y", "126-email-mcp-server",
        "[email protected]",
        "--email-password=yourpass",
        "--smtp-host=smtp.126.com",
        "--smtp-port=587",
        "--smtp-secure=false",
        "--require-tls=true"
      ]
    }
  }
}

📦 Package Information

• Package: 126-email-mcp-server
• npx ready: Use directly without installation
• Node.js: Requires Node.js 18+
• MCP SDK: Built with official MCP SDK

🤝 Support

• Issues: Report bugs and feature requests
• Documentation: Complete usage examples
• Community: Share your use cases

📄 License

ISC License - see LICENSE file for details.

Ready to send emails from Claude? Just add the configuration above to your Claude Desktop settings and restart! 🚀