[maeil]

> And that also goes for custom domains hosted on gmail. You only need a MX query to learn who is responsible for mail handling in a specific domain

Curious why this matters? Let's say you know [e-mail] is hosted on gmail, so what?

[nzach]

In this case is safe to assume [e-mail], [e-mail] and [e-mail] are all the same inbox. So you can just use the canonical form ([e-mail]) to hide where you got this email address from.