Transactional Email Operations: Compliance, Custom Domains, and Bounce Reconciliation
A signup system has one unforgiving constraint: a verification link that arrives late, twice, or not at all is a reliability failure at the exact moment a user is deciding whether to trust the product. TL;DR: choose a transactional email service only after the application owns idempotency, expiry, suppression, and delivery-state reconciliation. For US/EU delivery, custom-domain authentication and…
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