Don't be surprised if management actually is actually answering the email, if you are using the house URL.
Don't be surprised if management monitors all the emails sent to the house URL.
You have to use the girl's social media account or personal email account if you expect to talk to the girl personally, and privately.
And even there, you can't be 100% sure. Some years back right about when the HBO Cathouse series wound down, I got a bug to see Airforce Amy. Given that she was a media celebrity in a minor way, I was afraid she was priced WAY out of my budget. I looked up her email on her web site and sent her an email saying basically that I knew she could not talk price in email but to let me know if my max of $X was not going to work and I would not waste her time. She emailed back and said no problem.
When I SAW her, she opened the discussion by tossing out that her minimum was a figure 3.5 times what I'd said was my max budget in the email. I reminded her about our discussion and she got kind of weird and vague and seemed to not remember it at all. Some years later, I was chatting with a lady who had worked in the same house as Amy and told her that story. She told me that Amy likely had NOT seen any of the emails and that it was well known among the other ladies that Amy paid someone to handle her email and social media for her. So the moral of the story is that you can never be 100% sure WHO is on the other end of an email conversation, whether the house or an assistant. But yeah; I'd say your approach has a higher probability of actually being the lady than if you use a house address. Just don't assume that it's a given.
Oh, and I DID come to an agreement with her for a shorter session within my budget but that's another story . . .