OWA Exchange MCP Server vs Proton Mail MCP

In-depth architectural comparison of the OWA Exchange MCP Server and Proton Mail MCP 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 OWA Exchange MCP Server 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).
• Primary tools included: get_emails, get_email, send_email.

Explore OWA Exchange MCP Server Details

Choose Proton Mail MCP when:

• You need dedicated capabilities in the Communication domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: other (Free / Open Source).
• You have access to required keys: PROTONMAIL_USERNAME, PROTONMAIL_PASSWORD.
• Primary tools included: send_email, reply_email, reply_all_email.

Explore Proton Mail MCP Details

Feature & Specification Comparison

Specification	OWA Exchange MCP Server Communication	Proton Mail MCP sethbang Communication
Summary	MCP server for Microsoft Exchange / OWA — email, calendar, directory, availability	Unofficial Proton Mail MCP server — send, read, search, and organize email over SMTP and IMAP (via Proton Mail Bridge). Bulk ops with dry-run previews, read-only mode, and Trash-by-default deletes. Not affiliated with Proton AG.
Category & Scope	Communication

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": {
    "owa-exchange-mcp-server": {
      "command": "uvx",
      "args": [
        "exchange-mcp-server"
      ]
    }
  }
}

{
  "mcpServers": {
    "sethbang-proton-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "proton-mail-mcp"
      ],
      "env": {
        "PROTONMAIL_USERNAME": "YOUR_PROTONMAIL_USERNAME_HERE",
        "PROTONMAIL_PASSWORD": "YOUR_PROTONMAIL_PASSWORD_HERE"
      }
    }
  }
}

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