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 want to restrict internal users in lan , not to send emails using scripts. For external we have a relay connector, so unless we add the ip to it, email will not go to the external party.

We presently have Exchange 2013 servers, with 3 CAS servers running in NLD with a virutal IP.

4 MB servers in DAG.

So, any user can send email to Virtual IP and able to send.

My concern is , if i change the permissions and remove Anonymous on the Default Frontend connector, will it have impact for the External emails that we receive.

Need suggestion help.