SMTP Email MCP Server

A Model Context Protocol (MCP) server that provides email sending capabilities for Claude and other MCP-compatible AI assistants.

Features

Multiple SMTP Configurations: Configure and manage multiple SMTP servers
Email Templates: Create, update, and use reusable email templates
Bulk Email Sending: Send emails to multiple recipients with batching and rate limiting
HTML Support: Full HTML support for rich email content
Logging: Comprehensive logging of all email activities
Template Variables: Dynamic content using template variables

Installation

# Clone the repository
git clone https://github.com/samihalawa/mcp-server-smtp.git
cd mcp-server-smtp

# Install dependencies
npm install

# Build the server
npm run build

Usage

Starting the Server

npm start

Configuration

Add the server to your MCP configuration:

{
  "servers": {
    "smtp-email-server": {
      "command": "/path/to/node",
      "args": ["/path/to/mcp-server-smtp/build/index.js"],
      "enabled": true,
      "port": 3007,
      "environment": {
        "NODE_PATH": "/path/to/node_modules",
        "PATH": "/usr/local/bin:/usr/bin:/bin"
      }
    }
  }
}

Available Tools

send-email

Send an email to one or more recipients.

Parameters:

to: Array of recipients with email and optional name
subject: Email subject
body: Email body (HTML supported)
from: (Optional) Sender email and name
cc: (Optional) CC recipients
bcc: (Optional) BCC recipients
templateId: (Optional) ID of a template to use
templateData: (Optional) Data to populate template variables
smtpConfigId: (Optional) ID of the SMTP configuration to use

send-bulk-emails

Send emails to multiple recipients in batches.

Parameters:

recipients: Array of recipients with email and optional name
subject: Email subject
body: Email body (HTML supported)
from: (Optional) Sender email and name
cc: (Optional) CC recipients
bcc: (Optional) BCC recipients
templateId: (Optional) ID of a template to use
templateData: (Optional) Data to populate template variables
batchSize: (Optional) Number of emails to send in each batch
delayBetweenBatches: (Optional) Delay in milliseconds between batches
smtpConfigId: (Optional) ID of the SMTP configuration to use

get-smtp-configs

Get all configured SMTP servers.

Parameters: None

add-smtp-config

Add a new SMTP server configuration.

Parameters:

name: Name for the configuration
host: SMTP server hostname
port: SMTP server port
secure: Whether to use SSL/TLS
auth: Authentication credentials (user and pass)
isDefault: (Optional) Whether this is the default configuration

update-smtp-config

Update an existing SMTP server configuration.

Parameters:

id: ID of the configuration to update
name: Name for the configuration
host: SMTP server hostname
port: SMTP server port
secure: Whether to use SSL/TLS
auth: Authentication credentials (user and pass)
isDefault: (Optional) Whether this is the default configuration

delete-smtp-config

Delete an SMTP server configuration.

Parameters:

id: ID of the configuration to delete

get-email-templates

Get all email templates.

Parameters: None

add-email-template

Add a new email template.

Parameters:

name: Template name
subject: Email subject template
body: Email body template (HTML supported)
isDefault: (Optional) Whether this is the default template

update-email-template

Update an existing email template.

Parameters:

id: ID of the template to update
name: Template name
subject: Email subject template
body: Email body template (HTML supported)
isDefault: (Optional) Whether this is the default template

delete-email-template

Delete an email template.

Parameters:

id: ID of the template to delete

get-email-logs

Get logs of sent emails.

Parameters: None

Example Usage

Configure an SMTP server:
add-smtp-config( name: "Gmail", host: "smtp.gmail.com", port: 587, secure: false, auth: { user: "your-email@gmail.com", pass: "your-app-password" }, isDefault: true )
Create an email template:
add-email-template( name: "Welcome Email", subject: "Welcome to {{company}}!", body: "<h1>Hello {{name}},</h1><p>Welcome to {{company}}!</p>", isDefault: false )
Send an email using a template:
send-email( to: [{ email: "recipient@example.com", name: "John Doe" }], templateId: "welcome-email", templateData: { name: "John", company: "ACME Corp" } )
Send bulk emails:
send-bulk-emails( recipients: [ { email: "user1@example.com", name: "User 1" }, { email: "user2@example.com", name: "User 2" } ], subject: "Important Announcement", body: "<p>This is an important announcement.</p>", batchSize: 10, delayBetweenBatches: 1000 )

Requirements

Node.js 14+
Nodemailer for email sending
Access to an SMTP server

License

MIT