We have upgraded from 2007 to 2013 and we are planning on getting rid of our old list server to use Exchange's fancy new moderated distribution lists. To my dismay, it won't let you add smtp accounts, thus, I have to create an AD object for every member of our lists. The problem has come about giving access to users outside of our organization the ability to email the list.
If I set delivery management to the default, "Only members inside my organization" the following occurs: People in my organization are moderated, people outside get a NDR.
If I set delivery management to the other option, "Senders inside and outside my organization", the following occurs: People in my organization are moderated, people outside are not, and email goes through to the entire list.
How can I set this up so that inside and outside people get moderated. This seems poorly implemented, or maybe it is just not working properly.