mcp-electronic-messaging-gateway

Unified Mailbox Access and Transmission via Message Control Protocol (MCP) Endpoint

• Source Code Repository: https://github.com/ai-zerolab/mcp-email-server/
• Comprehensive Documentation https://ai-zerolab.github.io/mcp-email-server/

Deployment Instructions

Non-Persistent Setup

It is advised to utilize uv for environment management.

Execute uvx mcp-email-server@latest ui to initialize the configuration interface. Subsequently, integrate the following configuration snippet into your primary mcp client configuration file:

{ "mcpServers": { "zerolib-email": { "command": "uvx", "args": ["mcp-email-server@latest", "stdio"] } } }

This utility is published on the Python Package Index (PyPI); installation can be performed via pip install mcp-email-server. Following installation, launch the configuration interface with: mcp-email-server ui

Persistent Configuration via Environment Variables

Alternatively, settings can be defined using system environment variables, which is especially beneficial in automated CI/CD pipelines (e.g., Jenkins). The zerolib-email component prioritizes environment variable values over settings stored in the TOML configuration file.

{ "mcpServers": { "zerolib-email": { "command": "uvx", "args": ["mcp-email-server@latest", "stdio"], "env": { "MCP_EMAIL_SERVER_ACCOUNT_NAME": "work", "MCP_EMAIL_SERVER_FULL_NAME": "John Doe", "MCP_EMAIL_SERVER_EMAIL_ADDRESS": "john@example.com", "MCP_EMAIL_SERVER_USER_NAME": "john@example.com", "MCP_EMAIL_SERVER_PASSWORD": "your_password", "MCP_EMAIL_SERVER_IMAP_HOST": "imap.gmail.com", "MCP_EMAIL_SERVER_IMAP_PORT": "993", "MCP_EMAIL_SERVER_SMTP_HOST": "smtp.gmail.com", "MCP_EMAIL_SERVER_SMTP_PORT": "465" } } } }

Configurable Environment Directives

Directive	Purpose	Default Value	Mandatory
MCP_EMAIL_SERVER_ACCOUNT_NAME	Unique identifier for the mailbox setup	"default"	No
MCP_EMAIL_SERVER_FULL_NAME	User-facing name for display	Email prefix	No
MCP_EMAIL_SERVER_EMAIL_ADDRESS	The primary electronic mail address	-	Yes
MCP_EMAIL_SERVER_USER_NAME	Credentials for authentication (defaults to email address)	Same as email	No
MCP_EMAIL_SERVER_PASSWORD	Secret for mail access	-	Yes
MCP_EMAIL_SERVER_IMAP_HOST	Incoming mail server address	-	Yes
MCP_EMAIL_SERVER_IMAP_PORT	Incoming mail server port number	993	No
MCP_EMAIL_SERVER_IMAP_SSL	Activates secure connection (SSL/TLS) for IMAP	true	No
MCP_EMAIL_SERVER_SMTP_HOST	Outgoing mail server address	-	Yes
MCP_EMAIL_SERVER_SMTP_PORT	Outgoing mail server port number	465	No
MCP_EMAIL_SERVER_SMTP_SSL	Activates secure connection (SSL/TLS) for SMTP	true	No
MCP_EMAIL_SERVER_SMTP_START_SSL	Activates STARTTLS for SMTP	false	No

For distinct authentication requirements between receiving (IMAP) and sending (SMTP) services:

• Use MCP_EMAIL_SERVER_IMAP_USER_NAME / MCP_EMAIL_SERVER_IMAP_PASSWORD
• Use MCP_EMAIL_SERVER_SMTP_USER_NAME / MCP_EMAIL_SERVER_SMTP_PASSWORD

To test integration with Claude Desktop, or integrate with other mcp clients, determine the executable path using $which mcp-email-server and configure your client setup as follows:

{ "mcpServers": { "zerolib-email": { "command": "{{ ENTRYPOINT }}", "args": ["stdio"] } } }

If docker is available, containerized deployment is an option. Configuration in the client might involve specifying tools via MCP. The default configuration file location is ~/.config/zerolib/mcp_email_server/config.toml.

{ "mcpServers": { "zerolib-email": { "command": "docker", "args": ["run", "-it", "ghcr.io/ai-zerolab/mcp-email-server:latest"] } } }

Automated Deployment via Smithery

To facilitate automatic setup of the Email Server for Claude Desktop through Smithery:

bash npx -y @smithery/cli install @ai-zerolab/mcp-email-server --client claude

Project Maintenance

This codebase relies on uv for build management.

Run make install to set up the requisite isolated environment and integrate required pre-commit mechanisms.

Local development tasks can be executed using uv run mcp-email-server.

New Version Publication Procedure

1. Generate an authentication token on PyPI.
2. Securely store this API Token as a repository secret named PYPI_TOKEN via this configuration panel.
3. Initiate a new software release on Github.
4. Assign a new tag following the format *.*.* (e.g., 1.2.3).

For exhaustive detail on the Continuous Integration and Continuous Deployment (CI/CD) pipeline, consult this reference.

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