john.abcd.com

Original custom domain vs. subdomain - which is better for privacy? I own a domain and want to use it for my email addresses. I’ve selected an alias service or Tuta mail to go with because they offer unlimited aliases. Now, I’m confused about whether I should use my original domain name (e.g., abcd.com) or any subdomain (e.g., john.abcd.com) to register with this service. I'm afraid that if one of my email addresses created on my original domain gets compromised and circulates on the dark web, it could pose a significant risk for the domain as well as all other email addresses created under it. I know custom domains are not ideal for privacy since we need to use our real identity to purchase them, but I still want to maintain some level of privacy with them. Email addresses created on any custom domain are platform-independent, which is the main reason I've chosen to use a custom domain.