email-notifications

Transactional email and notifications for NestJS backends - queueing sends through background jobs, outbox and idempotency keys, a provider-neutral mail interface, MJML/HTML plus plain-text templates with typed data, deliverability (SPF, DKIM, DMARC, bounce and complaint webhooks, suppression lists), unsubscribe and preference models for non-transactional mail, local catcher and fake provider testing, rate limits and retries, PII-safe logging, and brief in-app and push notification patterns. Load when sending email, adding notification types, wiring a mail provider, building templates, or handling bounces and user notification preferences.