Mailcow Deliverability MCP

A read-only MCP server, written in PHP on the official PHP MCP SDK (mcp/sdk), that answers email deliverability questions from Mailcow/Postfix logs. Five tools: provider_reputation (accept/defer/bounce rates per receiving provider), top_deferral_reasons, bounce_breakdown, recent_rejections, and log_source_info. Runs over stdio or Streamable HTTP. A bundled anonymized sample log (8,944 lines) lets it run straight from a clone; 59 PHPUnit tests included.

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