VirtualHost email setup without users

Hi folks.

I have a 10.5.8 server with one main domain and a handful of VirtualHosts. A new VH (example.com) doesn't have any "users" per se, because it's just for hosting web and email. How can I set up email accounts? I don't mind using the terminal and entering aliases into the /etc/postfix/virtual file.

Do I have to create users on the box for this? The admin account on the box is a fake user to begin with.

I have looked at the docs and it seems that I have to create users somewhere for them to show up in the Workgroup Manager. That seems a bit much considering this is only used for email and web. So I thought I would ask here.

I'd move to a new server, but it's expensive for a small company and the upgrade path hasn't been cheap.

Any help appreciated.

Cheers