Hello Everyone

I've got ~100 users in my domain - lets call it mydomain.com

Now I want to restrict 10 of these users so they can ONLY email other users within mydomain.com and receive email from other users in mydomain.com 

Basically, I want them walled off within mydomain.com 

I found this KB article that allows to version 15 (I'm running build 7817 currently) - portal.smartertools com/kb/a3175/restrict-users-from-sending-or-receiving-email.aspx - it seems to do what I need it to do. It says "For example, if a company wants to use SmarterMail for internal communications, the system administrator can set up the service access settings to only allow users to send email to other users on the domain." - However, upon actually trying to implement the restriction I want it appears that it only allows you to block user access to services like SMTP/IMAP/POP etc. What I want to do is prevent users within mydomain.com from being able to email OUT to say, gmail.com and from users from external domains (say gmail.com) to not be able to email these specific users in mydomain.com

Is what I'm trying to accomplish possible with smartermail?

Thanks