Hi, I am trying to route emails by receipient domain name. For example, I need to route all hotmail.com emails to another server because hotmail is blocking my ip address. I have setup another postfix and I would like to route the emali to hotmail to the second postfix. The second server needs smtp authentication to relay. So far I can get the emails to go to the second server using ispconfig > email > email routing. How to make postfix authenticate to the second server so that the second server will accept it and relay it out? I have got the following setup for smtp authentication in /etc/postfix/main.cf smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = smtp_use_tls = yes What am I missing?