Tag
3 articles tagged with bounce handling.
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.
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.
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.
