As per this
post by tvdrew
in our forums.. it's not quite as easy to find as one might think
Here's how he explains it can work:
Options (upper right corner)-->message filters (under mail)-->new filter.
You should be able to figure it out from there (forward all to specific address).
also has another way to add:
1) Log into webmail.rcn.com
2) Mail Options (right side of the screen)
3) Select the Email Forwarding option
4) It'll ask you to log into USERTOOLS
5) Under advanced options, CHANGE MAIL FORWARDING SETTINGS
There you can set your forwarding options.
*New version URL can be found here: »usertools.rcn.com/
last modified: 2008-10-08 21:10:35