You want the Gmail account holder's IP address? I'm afraid that information isn't passed in e-mail headers. All you'll see are the Gmail server's IPs.

Yes that is what i'm looking for.

I know with hotmail you can get the senders IP, along with 99% of other emails I seem to recieve.

Since google is behind what information you see and don't see I can see how they do it technically, is it possible to do that with my own email server? If so, what is that privacy type feature called?

I forgot about that feature in Hotmail. I don't see that in Gmail headers. I can understand why they'd add something like that, but it takes a bit of anonymity out of the service.

X-Originating-IP: [000.000.00.000]
X-Originating-Email: [bill@hotmail.com]