If you need to force outbound mail out a different IP address on the server, you can do this using iptables with the following rule:
iptables -t nat -A POSTROUTING -p tcp -s ! 127.0.0.1 –dport 25 -j SNAT –to-source <new.ip.add.res>
If you need to force outbound mail out a different IP address on the server, you can do this using iptables with the following rule:
