Mailbox vs Fluxmail

In-depth architectural comparison of the Mailbox and Fluxmail 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.

Which MCP Server Should You Choose?

Choose Mailbox 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 Mailbox Details

Choose Fluxmail 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 Fluxmail Details

Feature & Specification Comparison

Specification	Mailbox Communication	Fluxmail Communication
Summary	Self-hosted MCP server for unified IMAP/SMTP mailbox access: read, list, and send email.	Read, search, draft, send, and organize email through Gmail and IMAP/SMTP mailboxes.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

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).

{
  "mcpServers": {
    "mailbox-2": {
      "command": "npx",
      "args": [
        "-y",
        "mailbox-2"
      ]
    }
  }
}

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

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