would anyone please help me to answer these few questions:
I have a domain "xxx.com" and name server. right now i want to setup mail server "zzz.xxx.com" in our branch office in other country which "zzz" is the name for our branch office place name, i want to know how to make "zzz.xxx.com" will be known in internet.(xxx.com already known internet) so the others want to send mail to firstname.lastname@example.org
, the mail will immediatelly send to zzz.xxx.com server not to xxx.com server, also when the zzz.xxx.com user want to send mail to outside, the zzz.xxx.com's mail server will send it immediatelly.