Hi Arcam,
Mailman is still running with this configuration here, so I suppose it's working with the HowTo...
You should go again through the HowTo, but the main point should be that the virtual domain has to be specified in the mailman config -- as you said, you checked that already. However if mailman does not create the list in the virtual-mailman file, then something is wrong with mailman's config, so you may also want to check the
Mailman documentation.
At the moment I've no clue what other thing may causes problems here...
Regards,
FeG