developer guides

Diagram of an application posting to a send endpoint, branching into API and SMTP delivery, and arriving in a recipient inbox.

How to Send Transactional Email: API, SMTP & Architecture

The three ways to send transactional email, how to choose between them, and the architecture decisions — queueing, retries, template storage — that decide whether it holds up in production.

August 13, 2026

Code editor sending an email from a Node.js application, with the resulting order confirmation shown in the recipient inbox.

developer guides6 min read

Send Transactional Email in Node.js: Step-by-Step Guide

A working Node.js implementation — sending by API, queueing dispatch, handling retries idempotently, and keeping templates out of your repository.

August 13, 2026