Sometimes groups want to communicate via group email but keep their individual email addresses hidden. To facilitate this we’ve added Privacy group setting which hides the email addresses of members from other members but allows them to communicate freely.
With this feature enabled your group will continue to work as usual but the email addresses of other members will be hidden. You can still reply directly to a member however this will use a proxy email address which will keep the original senders address hidden.
You can read more about this feature here.