React Email 5.0: Tailwind 4, Dark Mode Theming, and What Changes for Your Templates
React Email 5.0 ships Tailwind CSS v4, native dark mode theming, and a CSS compatibility checker. Here is what changed, what breaks, and whether to migrate or start fresh.
The Complete SaaS Email Stack: Build Every Template with React Email and Resend
Build the six essential SaaS emails - welcome, verification, password reset, trial ending, receipt, and dunning - with React Email and Resend. Includes setup code, edge cases, and time-saving shortcuts.
Why AI-Generated Email Templates Break in Production
AI email generators produce HTML that looks great in preview but breaks across Outlook, Gmail, and Yahoo. Learn why email HTML is different and what to use instead.
React Email vs MJML vs Maizzle: Which Email Framework Should You Pick in 2026?
A practical, opinionated comparison of the three dominant email frameworks - covering DX, TypeScript support, client compatibility, performance, and when to pick each one.
Multi-Tenant Email Templates with Next.js and React Email: Per-Brand Customization at Scale
B2B SaaS apps need to send emails that look like they come from the customer's brand, not yours. Build a dynamic, multi-tenant email template system with React Email, tenant config schemas, preview tooling, and caching.
Responsive Email Design Patterns with React Email
Over 60% of emails are opened on mobile, yet most templates are desktop-first. Learn fluid layouts, stacking columns, touch-friendly CTAs, and the CSS tricks that work across 90+ email clients.
Migrating from Handlebars to React Email: A Practical Guide
A file-by-file migration playbook: map Handlebars partials, helpers, and layouts to React Email components. Includes a coexistence pattern so you can migrate one template at a time without downtime.
NextAuth Password Reset Emails with React Email: A Secure Token Flow
A practical, production-safe password reset flow for Auth.js (NextAuth) + Next.js App Router: one-time tokens, hashed storage, short expiry, rate limits, and a React Email template that looks legit.
React Email Design Tokens & Theming: Build Consistent Email UIs That Scale
Stop copy-pasting button styles and hex codes. Use design tokens to centralize colors, spacing, typography, and layout across all your React Email templates. Includes multi-brand support and dark mode patterns.
React Email Error Boundaries: Catch Render Failures Before They Reach Production
Build production-grade error boundaries for React Email. Catch runtime failures, render fallbacks, log errors, and prevent silent email failures with defensive rendering patterns.
Server Actions + React Email: Type-Safe Email Sending in Next.js 15
Build type-safe email flows with Next.js 15 Server Actions and React Email. No API routes, no fetch boilerplate - just one function that validates, renders, and sends. Includes rate limiting, idempotency, and production patterns.
React Email Preview Environment Patterns: Dev, Staging, and Production Preview Servers
Build preview environments for React Email that scale from solo dev to team collaboration. Local preview servers, staging galleries, CI-deployed previews, and production-safe admin routes.
Webhook Monitoring for React Email: Track Delivery, Bounces, and Engagement in Production
Stop flying blind on email delivery. Set up webhooks to track deliveries, bounces, spam complaints, opens, and clicks. Includes retry logic, automated alerts, and engagement analytics for production React Email apps.
React Email Attachment Patterns: Files, PDFs, and Dynamic Attachments in Production
Handle email attachments in React Email: static files, dynamic PDFs, user uploads, S3 fetching, encoding gotchas, size limits, and multi-file sends that don't break.
Email Component Library Patterns: Build Reusable React Email Components That Scale
Build a production-ready React Email component library in under an hour. Foundation patterns for base layouts, styled primitives, buttons, sections, and alerts that prevent template chaos.
Email Template Versioning: How to Ship Breaking Changes Without Breaking Production
Stop breaking in-flight emails. Learn versioned template patterns, gradual rollout strategies, and backward-compatible migrations for React Email in production.
React Email Preview Testing: Local Dev, CI, and Cross-Client Automation
Build a complete testing workflow for React Email templates: local preview servers, automated unit tests, visual regression with Playwright, cross-client testing (Gmail, Outlook, Apple Mail), and CI integration.
Preview Data Patterns for React Email: How to Test Edge Cases Before Production
Stop shipping emails that break with real data. Use preview data factories, Zod validation, edge case variants, and centralized registries to catch bugs during development.
Internationalization for React Email: A Production-Ready i18n Guide
Add multi-language support to React Email templates: centralized translations, RTL support, date/currency formatting, subject line localization, and testing across locales.
React Email + API Routes: Production Patterns for Reliable Sends
Build production-ready email API routes with React Email: validation, error handling, idempotency, rate limiting, async patterns, and structured responses that prevent silent failures.
Testing React Email Templates: Unit Tests, Preview Tests, and Real Client Testing
A complete guide to testing React Email templates: unit tests for props validation, visual regression with Playwright, real client testing (Gmail, Outlook, Apple Mail), and CI/CD integration.
Dark Mode Email: How to Stop Your Emails Looking Broken in 2026
A practical guide to dark mode email support: how Gmail, Outlook, and Apple Mail each handle it differently, safe color choices, image handling, and a minimum viable approach you can ship today.
React Email + Resend: Production Checklist for Next.js
A practical pre-flight checklist for sending reliable transactional email in Next.js using React Email and Resend: env vars, validation, deliverability, idempotency, and tests.
Getting Started with React Email in Next.js
A step-by-step guide to setting up React Email in your Next.js project. Install, configure, preview, and send your first transactional email.