The answer
Use isolated configuration and designated test recipients, with links pointing to the intended preview environment and credentials that cannot broadly affect production messaging.
Why should development and production secrets be managed separately?
What should a preview deployment use when testing wedding invitations?
More FAQs in Why should development and production secrets be managed separately?
No. If both variables contain credentials with the same access, a development process can still reach production resources despite the different names.
No. Revoke or rotate the exposed credential, review relevant access, and update dependent services because copies may remain in history, logs, or other locations.
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