The mailing list for listmasters using Sympa

[Graham Pearson <address@concealed>]

Over the past 2 days I have been trying to upgrade Sympa to version 
6.0.1 and having issues with postfix aliases. Each of the mailing lists 
domains is a virtual domain on the mail server. I have crawled the web 
to find a resource that will assist me in what I am needing to do but at 
this time I have not found the right resources. Right now I have 4 
virtual domains running different mailing lists for each of the virtual 
robots in sympa.

When I send a message to address@concealed the message goes 
through like it is supposed to but when I view it in a client the email 
to line has address@concealed

Does anyone know where I can start to look to correct this as this would 
confuse our users?