I'm changing ISPs, and hence changing my Zimbra server's IP address and I'm wondering has anyone done this and if so, whether they have any tips.
My plan is to
a) Change the IP of the server (CentOS 5.5 x64) by editing /etc/sysconfig/network-scripts/ifcfg-eth0; /etc/hosts and /etc/sysconfig/network for the gateway address
b) reboot and check connectivity
c) rerun the current ZCS installation script.
d) Check that I can telnet in to the new address on port 25 from elsewhere
e) alter my DNS MX and TXT (SPF) records.
I have DNS under control. I'm just not confident that ZCS won't barf when it discovers that its underlying IP network has changed.