According to Wikipedia, the .test top-level domain “is guaranteed to never be registered into the Internet”, per RFC 2606. Would this also apply to email addresses? Meaning, if I were to send an invitation email to foo@bar.test, is it guaranteed to never be successfully sent/received?
My understanding is that for any .test domain, no MX or A/AAAA record will ever exist; therefore, no valid routing target will ever be found. This means that the mail server will return a hard failure and the message will never be delivered to anyone.
Is my understanding correct?
