Get webmail access on to port 80 as opposed to port 2443.
oaf357,
Webmail is on 2443/2080 so that InterWorx-CP can have control over them directly. Since port 80 is used by the client machine (i.e. you) we separate the 2. You are free to get webmail on port 80 by simply installing your favorite webmail program and providing the link to your users.
Chris