Engineering notes — things I keep re-explaining, written down once.
- Event notification design: transactional email, an SMS backstop, and verified delivery
- Node.js Transactional Email Deliverability: SPF, DKIM, DMARC, Bounces, and Polling
- SMS OTP API for SaaS login: rate limits, retries, and code verification in Node.js
- Password reset email templates: HTML preview, localization, and the transactional API
- Picking a Password Reset Email API: Resend, Postmark, SendGrid and the Alternatives