#email architecture | Blog

07 Jul 2026Sam wallness

Transactional Email Infrastructure Design: Building for Reliability at Scale

Transactional email has fundamentally different infrastructure requirements from marketing campaigns — it needs to be fast, reliable, and completely isolated from anything that could drag down its deliverability. This guide covers the architecture decisions that matter: queue design, authentication, suppression lists, monitoring, and how to test before you go live.

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Transactional Email Infrastructure Design: Building a System That Scales

SMTP & Infrastructure

07 Jul 2026Sam wallness

Transactional Email Infrastructure Design: Building a System That Scales

Transactional email — password resets, receipts, alerts, two-factor codes — is business-critical infrastructure. Here's how to design a reliable, scalable sending setup that handles growth without dropping messages or hurting reputation.

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