Are there any vainity/alias email configurations tools?

I've seen a tool called Powerscripts Plusmail, which has a nice email alias/forwarding tool, but I cannot find who sells it.

Basically, I need to redirect email that is generated by forms on a web site to a real email address. All of the web site address are aliases, e.g. info@domain.com, register@domain.com. These then get routed behind the seen to the real email account.