Resend provides a way for Large Language Models (LLMs) to compose and dispatch emails through the Resend API. By setting environment variables for your Resend API key, sender email, and optional reply-to addresses, you can equip your LLMs with the ability to send emails programmatically. It exposes a `send_email` tool with various inputs like recipient address, subject, content, and attachment support, offering a seamless integration for automated email communication.