What is the key difference between Lumail and Postbox Tools?

Lumail belongs to the Communication category with local stdio execution, while Postbox Tools belongs to the Communication category with cloud HTTP/SSE execution.

How do I install Lumail or Postbox Tools in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Lumail and Postbox Tools free or paid?

Lumail operates under a Free / Open Source model (No auth required). Postbox Tools operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Lumail lists 0 tools with 1 views and 2 GitHub stars. Postbox Tools lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Lumail and Postbox Tools together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Lumail vs Postbox Tools

In-depth architectural comparison of the Lumail and Postbox Tools MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Lumail

Communication · Local stdio

Quality: 44/100 (Fair) | Auth: No auth required

Postbox Tools

Communication · Remote HTTP/SSE

Quality: 30/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose Lumail if you need specialized Communication tools running via a local process. Choose Postbox Tools if your workspace requires Communication integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Lumail when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Lumail Details

Choose Postbox Tools when:

You need dedicated capabilities in the Communication domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Postbox Tools Details

Feature & Specification Comparison

Specification	Lumail Communication	P Postbox Tools Communication
Summary	Official Lumail email marketing MCP for campaigns, subscribers, and workflows.	Free email checks: blacklists (24 DNSBLs), spoofing/BEC grade, redirect tracing, mail tests, WHOIS.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

Lumail Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Postbox Tools Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Lumail Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "lumail": {
      "command": "npx",
      "args": [
        "-y",
        "lumail"
      ]
    }
  }
}

Postbox Tools Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "postbox-tools": {
      "url": "https://postboxservices.com/mcp/"
    }
  }
}

Frequently Asked Questions

Lumail is categorized under Communication and uses a local stdio subprocess. In contrast, Postbox Tools belongs to Communication using remote streaming HTTP/SSE transport. Select Lumail when you need capabilities focused on communication and Postbox Tools when you require tools for communication.

More alternatives to Lumail More alternatives to Postbox Tools Communication category hub