"Overview of Command Line Interface Usage" matching MCP connectors:

Open-source MCP server that gives AI agents access to real email and calendar in one npm install. Solves the problem of AI agents hitting a wall when they need your inbox.

InboxPolicy is an MCP email-verification server for agents. Get an actionable verdict: send, send_with_caution, review, retry_later, or avoid, with confidence and SMTP evidence, plus tools for detailed verification, asynchronous batches, and usage tracking