Update README.md

Add official MCP integration with Mailgun

Author: anton-efimenko

README.md

@@ -83,6 +83,7 @@ Official integrations are maintained by companies building production ready MCP
 - <img height="12" width="12" src="https://logfire.pydantic.dev/favicon.ico" alt="Logfire Logo" /> **[Logfire](https://github.com/pydantic/logfire-mcp)** - Provides access to OpenTelemetry traces and metrics through Logfire.
 - <img height="12" width="12" src="https://langfuse.com/favicon.ico" alt="Langfuse Logo" /> **[Langfuse Prompt Management](https://github.com/langfuse/mcp-server-langfuse)** - Open-source tool for collaborative editing, versioning, evaluating, and releasing prompts.
 - <img height="12" width="12" src="https://lingo.dev/favicon.ico" alt="Lingo.dev Logo" /> **[Lingo.dev](https://github.com/lingodotdev/lingo.dev/blob/main/mcp.md)** - Make your AI agent speak every language on the planet, using [Lingo.dev](https://lingo.dev) Localization Engine.
+- <img height="12" width="12" src="https://www.mailgun.com/favicon.ico" alt="Mailgun Logo" /> **[Mailgun](https://github.com/mailgun/mailgun-mcp-server)** - Interact with Mailgun API.
 - <img height="12" width="12" src="https://www.make.com/favicon.ico" alt="Make Logo" /> **[Make](https://github.com/integromat/make-mcp-server)** - Turn your [Make](https://www.make.com/) scenarios into callable tools for AI assistants.
 - <img height="12" width="12" src="https://www.meilisearch.com/favicon.ico" alt="Meilisearch Logo" /> **[Meilisearch](https://github.com/meilisearch/meilisearch-mcp)** - Interact & query with Meilisearch (Full-text & semantic search API)
 - <img height="12" width="12" src="https://metoro.io/static/images/logos/Metoro.svg" /> **[Metoro](https://github.com/metoro-io/metoro-mcp-server)** - Query and interact with kubernetes environments monitored by Metoro