emails domains and co-domains question bug or a feature

[omadon]

Why is email aliases so strangely generated.

Example:

I create site www.dummy.net with dns records.
System creates in dns domain dummy.net with www A record.
When I add email account test@dummy.net (account user01)
in virtusertable automatically is generated test@www.dymmy.net

Normally, 99% people doesn't have email test@www.dummy.net
but test@dummy.net. To fix this problem I added in co-domain
dummy.net and now there are two entries in virtusertable for
account user01 test@www.dummy.net and test@dummy.net

My question is what do I need to change in code and where so that
aliases are generated ONLY for sites specified in co-domains I realy
don't need alias @www.dummy.net. If I want one I can always add
it in co-domain.

One more question, where in GUI can I see what version of ispconfig
is installed.

Thanks.