[qmailadmin] Moving to qmail and qmailadmin

[myLocalStore]

I'm about to set-up qmail as my mail server for my clients. I would like to have a bit more information on qmailadmin before proceeding. I have a group of clients and I would like some of them to be able to maintain their own emails, forwards, aliases, etc. Can I and how do I set-up qmailadmin for this? Note: I also want to ensure that one client can not see another clients emails.   Secondly, is it possible to disable the create new email account for the clients. I want to be the only one that is able to create new email accounts.   Thanks, Rob