During the transfer approval process that Dreamhost uses, Dreamhost insists that someone click on the link that they email to the domain owner's email as listed at the original registrar.
We're just fellow customers here so we're just telling you what we understand of Dreamhost's policies as we've experienced them ourselves. You're free to contact them yourself, but recommend that you get the owner of the domain to turn off domain privacy and set the email address to a real one so they can click on the link. (or have them set it to yours so you can click on the link)
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