Hi,
I have only ever used 6.5 so not sure if this option will be available in 6.01 but thought Id suggest it anyway.
Can you set Webmail to use HTTPS in stead of HTTP?? If so then you could forward port 443 through to your mail server and do it that way.
I'm guessing someone must have thought of this already and the fact that nobody has posted it, probably means you can't do it, but worth trying.
I'd be interested to know if it is possible.
Kit Norriss