1. Authenticate your sending domain
Configure SPF and DKIM before sending production traffic. Proper authentication gives providers stronger trust signals and improves inbox placement consistency.
Transactional Email Best Practices
Transactional emails have one job: arrive quickly and reliably. This guide covers the core practices
that reduce spam-folder placement and keep your sender reputation healthy over time.
2. Keep complaint and bounce rates low
Remove invalid recipients quickly, never buy lists, and suppress addresses that hard bounce. Treat complaints as incidents and investigate root causes right away.
3. Use clear, expected message content
Match subject lines to message intent, avoid deceptive wording, and include a plain-text part. Consistent content quality supports long-term deliverability.
4. Separate transactional and marketing traffic
Keep critical emails like password resets and receipts on a dedicated stream so non-critical traffic cannot damage their reputation or throughput.
5. Build webhook-driven feedback loops
Process delivery, bounce, and complaint events in near real-time. Event feedback helps you suppress bad recipients and keep account health stable.
6. Monitor sending health weekly
Track send volume, bounce percentage, complaint percentage, and queue latency. Small regressions caught early are easier to fix than full deliverability incidents.
Next steps
Continue with the email deliverability checklist and then implement your integration using the API documentation.