Earlier quoted context omitted.
That’s exactly why I’ve used an “admin@“ address for decades now on email registrations. It has a filter that will then redirect anything from the registrar’s domain and junk anything else.
That's fun and I like the idea, until the ICANN decides you need to verify your domain or it'll be terminated within two weeks. Who knows what email sending service or domain they'll decide to use. (OVH, for instance, sent me this not only from a different domain, but from a different country TLD altogether than previous emails from them.) Do you also have a dedicated phone number for your registrar to call? And home…
ICANN don't do that. Your _registrar_ is required by ICANN policies (search for "Whois Data Reminder Policy") to send you notifications to ensure your contact information is current. Whether your domain gets terminated or not is largely down to your registrar, but if your contact details aren't accurate, you probably aren't getting billing notifications either.