fastapi-mail is a lightweight async Python library for sending emails from FastAPI/Starlette applications. It provides a clean, Pydantic-driven configuration model (ConnectionConfig), a message builder (MessageSchema) supporting HTML, plain text, Jinja2 templates, file attachments, CC/BCC/reply-to, and custom SMTP headers. The core FastMail class handles async SMTP delivery via aiosmtplib, with optional Redis-backed email validation utilities (DefaultChecker) and a WhoIsXmlApi wrapper. The architecture is simple and single-purpose: a library to be imported into FastAPI projects. It has comprehensive test coverage (22+ async tests) and modern async patterns throughout. The codebase is well-maintained with CI/CD, linting, and documentation. While the library does not exhibit groundbreaking innovation, it is a solid, production-ready solution for email sending in async Python web applications.