Summary

The ai-zerolab/mcp-email-server project offers a solution for integrating IMAP and SMTP email functionalities into applications via the MCP Server protocol. It targets developers and power users needing to programmatically access or send emails, providing a bridge between standard email protocols and a machine-readable interface. The primary benefit is simplified email integration, abstracting away the complexities of direct IMAP/SMTP client implementation.

How It Works

This project functions as a server that exposes IMAP and SMTP capabilities through an MCP Server interface. It allows applications to connect to email accounts using standard credentials and protocols, translating these interactions into the MCP format. Configuration can be managed through a command-line UI or environment variables, offering flexibility for different deployment scenarios, including CI/CD pipelines. The server supports both full read/write operations (IMAP and SMTP) and a read-only IMAP mode if SMTP configuration is omitted.

Quick Start & Requirements

• Installation: Recommended via uv (e.g., uvx mcp-email-server@latest ui). Alternatively, pip install mcp-email-server.
• Configuration: Via mcp-email-server ui or environment variables (e.g., MCP_EMAIL_SERVER_EMAIL_ADDRESS, MCP_EMAIL_SERVER_PASSWORD, MCP_EMAIL_SERVER_IMAP_HOST).
• Prerequisites: Python environment managed by uv is recommended.
• Documentation: https://ai-zerolab.github.io/mcp-email-server/

Highlighted Details

• Supports read-only IMAP mode by omitting SMTP host configuration.
• Optional attachment downloads, configurable via environment variable (MCP_EMAIL_SERVER_ENABLE_ATTACHMENT_DOWNLOAD) or TOML.
• Automatic saving of sent emails to the IMAP Sent folder, with support for custom folder names.
• Configurable HTTP transport security, including DNS rebinding protection and allowed hosts/origins.
• Handles self-signed certificates and STARTTLS for local mail bridges (e.g., ProtonMail Bridge).

Maintenance & Community

No specific details regarding maintainers, community channels (like Discord/Slack), sponsorships, or roadmap were found in the provided README content.

Licensing & Compatibility

The provided README content does not explicitly state the software's license. This absence may pose a compatibility concern for commercial use or integration into closed-source projects.

Limitations & Caveats

SMTP functionality is disabled when MCP_EMAIL_SERVER_SMTP_HOST is omitted, resulting in a read-only mode. DNS rebinding protection is enabled by default and may require explicit configuration (MCP_ALLOWED_HOSTS, MCP_ALLOWED_ORIGINS) for certain network setups like Docker or reverse proxies. Disabling security features like DNS rebinding protection or SSL verification is recommended only for isolated local development environments.