Dead Letter MCP Server

@BigCactusLabs

Basic information

About Dead Letter MCP Server

Convert .eml and .mbox email, including Gmail Takeout, to Markdown with YAML front matter

Dead Letter MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "dead-letter": {
      "command": "uvx",
      "args": [
        "--python",
        "3.12",
        "--from",
        "dead-letter[mcp]",
        "dead-letter-mcp"
      ]
    }
  }
}

Dead Letter MCP Server tools

`eml_path`

`eml_path`, `bundle_root`

`directory`, `output_directory`

`path`, `output_directory`

`eml_path`

Overview

What is Dead Letter?

Convert .eml and .mbox email, including Gmail Takeout, to Markdown with YAML front matter

How to use Dead Letter?

The README includes setup instructions such as uvx --python 3.12 dead-letter convert message.eml.

Key features of Dead Letter

Agent workflows — expose conversion and diagnostics directly to Claude, Codex, and other MCP clients
CLI — point it at a file or a directory and go
Install validation — dead-letter doctor checks your runtime environment
MCP server — integrate with Claude Desktop, Claude Code, Codex, and other MCP clients
Portable Agent Skill — teaches skill-aware agents when and how to convert .eml files

Use cases of Dead Letter

Connect an MCP-compatible client to this repository's service.
Review the README-backed setup before enabling it in production.

Frequently asked questions

Where is the source code for Dead Letter?

The source code is linked from the repository URL on this page.

Does Dead Letter include a standard MCP config?

If the README contains a parseable MCP configuration block, it is shown in the Config tab.

Comments

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