I cannot answer the question as it requires context. But I will say that I have a personal domain with mail forward and when I register anywhere, I put domain@m

I cannot answer the question as it requires context. But I will say that I have a personal domain with mail forward and when I register anywhere, I put domain@mydomain.com, so then I know who is leaking my email. For example ycombinator@johndoe.com. I have a lot of these emails, beside few others that also include business emails.