In Exchange 2010 is it possible to set some sort of explicit deny on recipients in an already existing distribution list? I have a number of contractors who have been employed by my company for years and now management wants to make sure they do not receive email messages sent from a specific DL. This DL has literally has hundreds of nested groups in it which these contractors are members of. So instead of cherry picking there AD profiles I would like to create an AD group place all contractors in it and deny that group from receiving emails from the all employee DL. Is this possible or can anyone suggest a better way.
Thanks in advance.