I've seen that you can recover your deleted SMS from your phone with this tool.
However my phone is not Jailbreaken, so I can't use the app, but I was wondering if it's still possible to browse the phone's "Application Data\Outlook" folder from a computer.
I can't check because I have a Mac and I don't know any option to explore WP on a Mac. If you tell me it's possible, I will install Windows (or if there's an option to browse the "Application Data\Outlook" folder from a Mac it's even better !)
Thanks
Jojo