I am curious what happens to the emails when we delete accounts using "zmprov da user@domain.com"

Do all the emails for that account get deleted or..... does running that command only delete an identifier in the database saying this account exists thus leaving all the email hanging in limbo somewhere in some datastore unlinked to an account.

it seems when I delete accounts using zmprov it happens real fast making me think that maybe the actual emails of each account are not being deleted... hence my question.