Okay, I am asking to verify I am understanding this correctly. (If I am wrong, I'll end up sending 100s of email notifications to ordinary users for test and development activity, which will have a very bad affect on user's opinions of the platform).

Does merely populating this field force all Service Now generated SMTP messages to be sent only to the email address listed in this configuration property "glide.email.test.user"?

I am testing this as well, but would like to hear from some others who've had more experience.