dear community, have installed ispconfig 3 with the recommended debian 8 + dovecot + postfix setup. so now, all working fine. i have created a second virtual interface with my serverip +1 (main-ip: 85.131.X.10, add.-ip: 85.151.X.11). so now how can i say postfix that he should send out emails via *.11 IP-address? thank you very much, many greest, iceget