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15 articles tagged with transactional email.
A complete guide to Shopify email templates: the difference between transactional notifications and marketing campaigns, which of Shopify's default templates are worth customizing, how to edit them safely, the seven automations every store should run, and integration setup.
A timeout tells you where the SMTP conversation stopped, and that narrows the cause fast. Here are the timeout stages, the four root causes worth checking, a ten-minute diagnostic sequence, and the production patterns that prevent recurrence.
Email logs record what receiving servers actually said about your mail. Here's which events matter, how to read SMTP response codes, the alerts worth configuring, stream separation, retention rules and a weekly review routine.
Self-hosted server, dedicated IP, or shared relay? They are three different decisions and most teams pick the expensive one for a hypothetical problem. A side-by-side comparison, the five cases that justify dedicated infrastructure, and the hidden ops costs nobody scopes.
Email API rate limits come in four layers - request rate, sending quota, SMTP concurrency, and receiving-ISP throttling - and each returns a different error. This guide covers reading rate-limit headers, which responses to retry and which never to, backoff with jitter, queue architecture, and separating transactional from bulk traffic.
Email webhooks push delivery, bounce, click, and complaint events to your application in real time instead of making you poll an API. This guide covers the event types and how far to trust each one, payload structure, building an endpoint that acknowledges fast and processes async, signature verification, handling duplicates and out-of-order delivery, and automatic suppression.
At high volume, your mail queue decides whether password resets arrive in seconds or minutes. Here is how to separate traffic classes, throttle per destination, build a retry ladder with jitter, enforce idempotency, and monitor the metrics that matter.
An email API POSTs JSON over HTTPS; SMTP relay runs a multi-step protocol conversation on port 587. This guide compares the two on latency, batching, error handling, templates, and vendor lock-in, includes a full port reference table, and shows the hybrid setup most teams actually end up running.
A practical reference for SMTP error codes: how to read a reply in ten seconds, the difference between 4xx soft bounces and 5xx hard bounces, lookup tables for the codes you will actually hit, and fixes for the five that cause most real-world pain — plus the ports that quietly cause silent failures.
The nine transactional email templates every product needs, with copy examples for password resets, receipts, failed payments, and shipping notices. Includes a transactional vs. marketing comparison table, sending-stream separation advice, variable-naming rules, and a pre-launch QA checklist.
How to choose the best email API in 2026 without getting lost in feature checklists. Covers the eight evaluation criteria that actually predict deliverability, the four categories providers fall into and their tradeoffs, how to read API docs like an engineer, a REST-versus-SMTP comparison table, and a safe migration sequence.
A transactional email is a one-to-one message triggered by a user action. Here is how it differs from marketing email, 16 examples to audit your product against, the SMTP ports and DNS records you need, and where promotional content crosses the line.
An SMTP relay forwards your outgoing email through trusted servers so it reaches the inbox. Learn how relays work, how they differ from direct delivery, and when to use one.
How SMTP relay services deliver your email, and the concrete criteria to evaluate one: authentication, IP reputation, own-domain sending, reporting, and pricing.
Transactional emails are triggered by a user's action; marketing emails promote to a list. Here's the difference in purpose, consent, deliverability, and design.
