Postfix SMTP Rotating IP using IPTables Rumi, August 1, 2022 I got 5 Public IPs. i’m Gonna configure them, so Postfix can use multiple interfaces/ips for outgoing smtp connections. First we need creating Interface aliases for those 5 public IPs. In my system, using centos: # cd /etc/sysconfig/network-scripts/ # cp ifcfg-eth0 ifcfg-eth0:1 Edit ifcfg-eth0:1 # vi ifcfg-eth0\:1 DEVICE=eth0 <– default… Continue Reading