Deliverability Postmortems: Learning From Incidents
The incident is over, placement recovered, and the pressure to move on is enormous. The blameless postmortem practice that converts each incident into prevention.
Explore the engineering principles behind reliable communication systems, including failover strategies, retry logic, message queues, latency optimization, high availability, delivery guarantees, and scalable messaging infrastructure.
The incident is over, placement recovered, and the pressure to move on is enormous. The blameless postmortem practice that converts each incident into prevention.
For OTPs and password resets, seconds are the metric. Where latency hides in the sending path, how to measure time-to-inbox honestly, and what budgets to hold.
Everyone has received the same email twice. The retry loops, queue semantics, and race conditions that cause duplicates, and the idempotency patterns that stop them.
Email is a DNS application. The full record inventory a sending domain needs, the TTL strategy for safe changes, and the misconfigurations that quietly break delivery.
Every sending platform offers SMTP relay and an HTTP API. The differences in latency, error handling, portability, and observability, and how to choose per workload.