Send Transactional Emails
Create a reliable email workflow for welcome messages, order receipts, and authentication notices with templates that stay maintainable.
Posted by
Marc LouRelated reading
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Introducing Supabase to Indiexyz
Supabase is an open-source Firebase alternative. It's a great tool for building a backend for your app. It's now integrated with Indiexyz!
Why transactional email matters
Transactional email confirms critical moments in your product: account creation, password changes, successful payments, and access to important downloads. Unlike campaigns, these messages are part of the user flow.
1. Choose an API-first provider
Add your provider credentials to the environment, then keep the API key server-side only. Mailgun, Resend, and Postmark all work well with Next.js route handlers.
MAILGUN_API_KEY=your-server-key
MAILGUN_DOMAIN=mg.example.com
NEXT_PUBLIC_SITE_URL=https://indiexyz.com2. Use one template contract
Give every template the same input shape: user name, action URL, product name, support email, and expiration. This keeps welcome emails, receipts, and alerts consistent as your product grows.
3. Send from server actions
Trigger email only after the database write succeeds. Queue retries for temporary failures, log provider message IDs, and never expose delivery internals to the browser.