Much obliged to all who have helped me out,
The first time I built a mail server of any sort, was with FC5, and ISPconfig, and sure it didnt work the first time cause i didnt have flex, but the 2nd round was just perfect.
On the 2nd server, i had nothing but issues, all relating to mysql. for some reason, on the 10th (yes 10th) install, it was seamless, right up until i tried to log into ispconfig admin, and this certificate problem.
will test that out tomorrow martinfst. Let you know how i go.
so again, thanks everyone. very much appreciated.