How to E2E Test Mailgun Email Workflows in Playwright (opens in new tab)

Mailgun is a popular transactional email API trusted by developers for reliable delivery. But how do you test that your Mailgun emails actually arrive, contain the right content, and work end-to-end in CI? This guide covers the full testing progression — from local development to automated Playwright tests in GitHub Actions. The app we're testing A Next.js API route that sends a verification email via Mailgun: // app/api/auth/signup/route.ts import Mailgun from 'mailgun.js'; import FormData f...