If your Rabble account is registered with an email that ends in @privaterelay.appleid.com, it means you created your account with Apple ID and chose the option “Hide My Email.”
What this means:
Apple creates a random email address just for you.
All emails we send to this address are automatically forwarded to your real inbox.
You can reply to these emails like normal – we still won’t see your personal email.
Your real email address stays private at all times.
This is Apple’s way of protecting your privacy. You can read more about how it works on Apple’s support page: Hide My Email.