Transport setting in postfix

Something I missed when installing postfix. I relied on hostname in order to check whether the mails should go internaly or be forwarded to another relay. A simple reboot will render the setting useless.

It's one of the first thing to do when setup a new postfix. Set the transport mail variable in /etc/postfix/main.cf, set the transport setting in /etc/postfix/transport and postmap it.

Normal installation plus that should do the job, for basic requirement using Unix accounts that is.