Email MCP Server

This project provides a Model Context Protocol (MCP) server for sending emails via a single tool, send_email.

Features

• Exposes a single MCP tool: send_email (send an email via SMTP)

• Uses nodemailer for SMTP email delivery

Related MCP server: Sendmail MCP Server

Environment Variables

Set the following environment variables before running the server:

• SMTP_HOST (required): SMTP server hostname

• SMTP_PORT (optional, default: 587): SMTP server port

• SMTP_SECURE (optional, default: false): Set to true for port 465, otherwise false

• SMTP_USER (required): SMTP username

• SMTP_PASS (required): SMTP password

• SMTP_FROM (optional): Sender email address (defaults to SMTP_USER)

Installation

npm install

Running the Server

npm start

The server will start and listen for MCP requests on stdio.

Integration with Claude Desktop

To integrate this server with Claude Desktop, add the following to your claude_desktop_config.json:

{
    "mcpServers": {
        "email-mcp": {
            "command": "node",
            "args": [
                "D:\\projects\\Bitsol Projects\\email-mcp\\dist\\src\\index.js"
            ],
            "env": {
                "SMTP_HOST": "smtp.gmail.com",
                "SMTP_PORT": "587",
                "SMTP_SECURE": "false",
                "SMTP_USER": "<your_email>",
                "SMTP_PASS": "<your_app_password>"
            }
        }
    }
}

Replace <your_email> and <your_app_password> with your actual SMTP credentials.

Tool: send_email

Arguments

• to (string, required): Recipient email address

• subject (string, required): Subject of the email

• text (string, required): Plain text body of the email

• html (string, optional): HTML body of the email

Example Call

{
  "name": "send_email",
  "arguments": {
    "to": "recipient@example.com",
    "subject": "Hello",
    "text": "This is a test email."
  }
}