Giving an email increases the odds of comms by email, however I don’t believe it’s guaranteed. Only way to tell is normally (possibly not always!) once you get an email for AoR all other emails following will match, so FP if relevant, test/interview and then oath.
Many many people get the emails as spam so whitelist the *. part at the end and check folder. Every email I’ve gotten including a web form query is from a different address!