Native iphone mail over VPN ?

[yanks123]

Hello, I work for a company that has not approved the iphone/microsoft exchange integration. However, they do allow me to VPN in to the network via the phone. I am able to check mail via our webmail application, but it's a web client and frankly sucks. Was wondering if anyone knows a way to do some sort of "hack" that the iphone could view the mail received over VPN in the native mail client? I can do this via laptop today, of course, i'm using Outlook on the laptop (standard at work). Wondering if there was anything I could do to make the iphone piece more straightforward (native mail). Thanks for the responses