I have setup mail.mydomain.org, but now for another virtual domain, i'd like mail.thatdomain.org as well - how?

view story

http://serverfault.com – I'm using postfix and a mail dns mail.mydomain.org But now I am adding another virtual domain and I would like a mail dns for that as well, e.g. mail.mydomain.org and mail.newdomain.org. I have added the mx records already for this new mail domain - but I don't know what I would change in my postfix config for both to work as mail.mydomain.org already occupies the space in the directives: Here is an output of postconf -n: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix d (HowTos)