Email MCP Server

This MCP (Model Context Protocol) server lets your AI assistant send emails for you.

What Can It Do?

Your AI assistant can:

• Send both plain text and HTML emails
• Attach files and documents
• Send to multiple people with CC/BCC
• Check if your email setup works

Available Tools

send_email - Simple Email Sending

Send emails quickly using your environment configuration:

• Just specify recipient, subject, and body
• Automatically uses your configured SMTP settings
• Perfect for quick messages

send_custom_email - Advanced Email Features

Send emails with full control:

• Send to multiple people with CC/BCC
• Add file attachments
• Use HTML formatting
• Override SMTP settings per email

test_smtp_connection_tool - Check Setup

Test your email settings before sending important emails.

Getting Started

1. Install Required Software

# Install uv (Python package manager)
curl -LsSf https://astral.sh/uv/install.sh | sh

# Restart your terminal or run:
source ~/.bashrc

2. Install Project Dependencies

cd email-mcp-server
uv sync

3. Test the Installation

# Test your email setup
uv run python test_email.py

# Run the server directly (for testing)
uv run main.py

4. Configure Claude Desktop or Cursor

Add this to your Claude Desktop configuration or Cursor file:

{
  "mcpServers": {
      "mcp-server": {
          "command": "uv",
          "args": [
              "--directory",
              "path/to/the/app/email-mcp-server",
              "run",
              "main.py"
          ],
          "env": {
              "SMTP_HOST": "",
              "SMTP_PORT": "",
              "SMTP_SECURE": "",
              "SMTP_USER": "",
              "SMTP_FROM": "",
              "SMTP_PASS": ""
          }
      }
  }
}

Important: Change the directory path to match your actual installation location.

Simple Examples

Send a basic email:

"Send an email to john@company.com saying the meeting is tomorrow at 2 PM"

Send with HTML formatting:

"Send an HTML email to team@company.com with subject 'Weekly Update' and create a nice formatted message about this week's progress"

Test your setup:

"Test the email connection to make sure it's working"

Advanced Examples

Send to multiple people with attachments:

"Send a custom email to the team about the project update. Send to team@company.com, CC manager@company.com, and attach the project report"

Email Provider Setup

For Gmail

"env": {
    "SMTP_HOST": "smtp.gmail.com",
    "SMTP_PORT": "587",
    "SMTP_SECURE": "false",
    "SMTP_USER": "your-email@gmail.com",
    "SMTP_FROM": "your-email@gmail.com",
    "SMTP_PASS": "your-app-password"
}

Gmail Setup Steps:

1. Enable 2-Factor Authentication
2. Go to Google Account → Security → App passwords
3. Generate an app password for "Mail"
4. Use the 16-character app password

For Outlook

"env": {
    "SMTP_HOST": "smtp-mail.outlook.com",
    "SMTP_PORT": "587",
    "SMTP_SECURE": "false",
    "SMTP_USER": "your-email@outlook.com",
    "SMTP_FROM": "your-email@outlook.com",
    "SMTP_PASS": "your-password"
}

For Other Providers

Replace the SMTP settings with your provider's details. Most providers use:

• Port 587 with SMTP_SECURE=false (STARTTLS)
• Port 465 with SMTP_SECURE=true (SSL)

Configuration Variables

Variable	Description	Example
SMTP_HOST	Your email server	smtp.gmail.com
SMTP_PORT	Server port	587
SMTP_SECURE	Use SSL (true/false)	false
SMTP_USER	Your username	user@gmail.com
SMTP_FROM	Sender address	noreply@company.com
SMTP_PASS	Your password	your-password

Troubleshooting

"Missing Configuration"

• Make sure all environment variables are set in the Claude Desktop config
• Check that the directory path is correct and absolute
• Restart Claude Desktop after making changes

"Authentication Failed"

• For Gmail/Yahoo: Use app passwords, not regular passwords
• Enable 2-Factor Authentication first
• Double-check username and password

"Connection Issues"

• Verify SMTP host and port are correct
• Check your internet connection
• Some networks block SMTP ports

"Server Not Found"

• Make sure uv is installed and in your PATH
• Check that the directory path exists
• Verify the project dependencies are installed with uv sync

Testing

# Test configuration and connection
uv run python test_email.py

# Send a real test email to yourself
uv run python test_email.py --send-real

License

MIT License - Feel free to use and modify as needed.