Email Security - Protected Mailboxes vs Unprotected

Question

Hello, I've been playing with Email Security and it seems that if an address for the domain is not part of the protected mailboxes list, it will be denied and rejected by the Sophos Gateway? 
 Is there a way to say: "if not in the list, just forward and don't protect"? 
 I don't want to have to add all mailboxes and aliases for a domain, just the ones that matter.

emmosophos · Answer

Hello Mile, 
 Thank you for contacting the Sophos Community. 
 If you use Mail Flow and Azure AD sync you can achieve this, by only protecting the Group of the users that you want to protect. 
 If you&rsquo;re using Gateway mode, this isn&rsquo;t possible at the moment. 
 Regards,