Have Postfix 2.6.6 on RedHat which is used as an internal mail relay server for all incoming emails to be relayed to our exchange server. We are relaying emails destined to our domain ( mydomain.com ) to our exchange mail server ( 10.10.0.1 ). This is done by /etc/postfix/transport containing "mydomain.com smtp:[10.10.01] ".
We also want to relay emails from a single email sender "sender@otherdomain" to our exchange server at 10.10.0.1. How can we do this?