"catch-all" mail settings

is the first mailbox created by the system a catch-all (meaning it will catch all mails for the domain that is not catched by other mailboxes) and how can we control this behavior? disable it completly as this is/should be the norm or allow the webadmin to control who has this spam-catching behaviour?

HC enable 'Catch all ' only on first mailbox added with mail domain. And it don't allow to enable on other mailboxes.

ok, to combat spam maybe it would be a possible feature in the next version to

1) disable catch-all altogether?
2) and/or change what acount is the catch-all
3) delete the inital emailaddress created by the system