ihave extrnal domain lets call it www.abc.com
and i create local domain name with same abc.com i also create exhange server localy
which it have real ip call it mail2.abc.com and i have also exhange server exist extrnaly
lets call it mail.abc.com whcih have some email now i want configure the local exhange server to allow send and recive extrnal email ,how i can do that ,can i configure mx record for local exchange in extrnal dns .
can you please advice me
thanks in advance