[MM3-users] Alias for a list name

I've migrated a list from mm 21 to mm 3 sucessfully. The mm 21 runs on domains managed by Postfix as virtual alias domains. That way it was possible to alias a shorter name for a list to the list name.

To run mm 3 through Postfix, I use local_recipient_maps and transport_maps.

What I want to achieve, is alias medlem@list.saf-org.no to saf-medlem@list.saf-org.no

I tried to put

medlem@list.saf-org.no: saf-medlem@list.saf-org.no

and get the following error when running newaliases:

postalias: warning: /etc/aliases, line 231: name must be local

Is it possible to do this aliasing in a simple way?

Thanks, Lars