React Email Components

React Email is an open-source collection of unstyled React components for building emails using React and TypeScript. Created by Bu Kinoshita and the Resend team, the library provides components for common email elements including headers, footers, containers, sections, columns, buttons, links, images, dividers, code blocks, and Markdown rendering, all designed to render correctly across email clients including Gmail, Outlook, Apple Mail, and Yahoo. The components accept standard React props and support Tailwind CSS through a custom engine, enabling familiar styling patterns without writing inline HTML tables and conditional CSS hacks that email development traditionally requires. The library includes a preview server for local development that renders emails in the browser with hot reload, and a deliverability toolkit featuring an email linter that checks for common rendering issues, a client compatibility checker that tests against major email clients, and a spam score estimator. React Email integrates with email service providers including Resend, SendGrid, Mailgun, Amazon SES, Postmark, and NodeMailer through adapter packages. The project has over nineteen thousand stars on GitHub and is used by companies including Linear, Cal.com, Dub.co, and Mintlify for their transactional and marketing email templates.