As far as the service is concerned, that's simply an entirely different email address. You might as well do shabadoo@domain.tld. Since you control domain.tld, y

As far as the service is concerned, that's simply an entirely different email address. You might as well do shabadoo@domain.tld. Since you control domain.tld, you can of course receive any email sent to it. But the point the GP was making is that email addresses are treated by services as if the will always be tied to the same person, but that's simply not true.