AWS SES template changes look harmless in a pull request. Usually it is "just copy" or "just a handlebars variable." Then the deploy goes out and a missing field, stale support link, or broken CTA lands in production. That is why I now treat SES template validation as a release gate, not a last-minute spot check.
The useful shift is simple: validate the rendered email end to end from a containerized job, with one short-lived inbox per run. If the job cannot prove the template rendered the right subject, links, and account context, the release should stop there. It sounds strict, but it saves a lot of avoidable cleanup later.
Why SES template changes deserve a release gate
SES failures are not always delivery failures. More often, the message arrives and is still wrong:
the subject matches an older campaign or enviroment
