MCP Electronic Correspondence Relay System

A Model Context Protocol backend engineered to deliver email capabilities. This service empowers Large Language Models to generate and dispatch messages, in addition to locating supplementary files within designated repository structures.

Core Capabilities

• Transmission of messages to multiple recipients simultaneously
• Accommodation for embedded file attachments
• Retrieval of artifacts from directories contingent upon specified text patterns
• Guaranteed secure delivery pathway employing the Simple Mail Transfer Protocol (SMTP)

Exposed Utilities

• send_email - Executes the dispatch of electronic mail based on supplied subject, primary content, and destination addresses.
• receiver (list of text strings, mandatory): Collection of recipient email addresses.
• body (text string, mandatory): The principal narrative content of the communication.
• subject (text string, mandatory): The headline identifier for the message.

• attachments (list of text strings or a single text string, optional): Supplementary materials accompanying the email (specified by filename).

• search_attachments - Scans designated folders for artifacts whose names correlate with a provided search criterion.

• pattern (text string, mandatory): The character sequence utilized to filter file names.

Operational Invocation Guidelines

• send_email
• Initiate message transmission, optionally including supplemental files.

• Parameters:

  • receiver (required): The roster of destination email identifiers.
  • body (required): The core textual payload of the correspondence.
  • subject (required): The subject heading for the communication.
  • attachments (optional): The list of associated files.

• search_attachments

• Investigate file system locations for names matching a specific string.
• Parameters:
  • pattern (required): The text filter to apply against file names.

Deployment Instructions

Via pip

Install necessary external libraries:

bash pip install pydantic python-dotenv

Mail Transport Configuration

A configuration document named email.json containing SMTP server credentials:

[ { "domain": "@gmail.com", "server": "smtp.gmail.com", "port": 587 }, { "domain": "@outlook.com", "server": "smtp.office365.com", "port": 587 }, { "domain": "@yahoo.com", "server": "smtp.mail.yahoo.com", "port": 587 } ]

Operationalization

Activating the Relay System

Launch the MCP Mail Relay Service using:

bash python -m mcp_email_server (--dir /location/of/artifact/storage)

Integration with Claude.app

Incorporate the following configuration into your Claude settings:

Conda Environment Setup

{ "mcpServers": { "email": { "command": "D:\conda\envs\mcp\python.exe", "args": [ "C:\Users\YourUserName\Desktop\servers\src\email\src\mcp_server_email", "--dir", "C:\Users\YourUserName\Desktop" ], "env": { "SENDER": "2593666979q@gmail.com", "PASSWORD": "tuogk......." } } } }

UV Environment Setup

{ "mcpServers": { "email": { "command": "uv", "args": [ "~\servers\src\email\src\mcp_server_email", "--dir", "C:\Users\YourUserName\Desktop" ], "env": { "SENDER": "2593666979q@gmail.com", "PASSWORD": "tuogk......." } } } }

Security Caveats

• App-specific credentials may be necessary when utilizing services like Gmail.
• The service imposes constraints on the variety of attachment file formats permitted, for heightened security.

Permitted Artifact Formats

The relay system recognizes the subsequent attachment file extensions:

• Documentation: doc, docx, xls, xlsx, ppt, pptx, pdf
• Compressed Archives: zip, rar, 7z, tar, gz
• Plain Text/Data: txt, log, csv, json, xml
• Imagery: jpg, jpeg, png, gif, bmp
• Miscellaneous: md

Illustrative Operations

Dispatching Mail

{ "receiver": ["destination@example.com"], "subject": "Test Transmission from MCP Relay System", "body": "This is a verification message dispatched using the MCP Mail Relay Service.", "attachments": ["document.pdf", "image.jpg"] }

Querying for Artifacts

{ "pattern": "summary_data" }

Collaboration Guidelines

We welcome community contributions to expand and refine the MCP Mail Relay Service. Whether you aim to introduce novel utilities, augment current functionalities, or improve the explanatory documentation, your input is valued.

Refer to the following repository for examples of alternative MCP backends and implementation blueprints: https://github.com/modelcontextprotocol/servers

Feature branches and pull requests detailing new ideas, bug resolutions, or enhancements to boost the utility of the MCP Mail Relay Service are encouraged!

Licensing

The MCP Mail Relay Service is distributed under the terms of the MIT License. This grants the freedom to utilize, alter, and disseminate the software, subject to adherence to the conditions stipulated by the MIT License.

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