Change Zimbra Server’s IP via Command Line – CentOS / Ubuntu

su - zimbra

# Below command will show you the Old IP

postconf mynetworks
mynetworks = 127.0.0.0/8 192.168.0.0/24

# Also check via Zimbra LDAP configuration

zmprov getServer zimbra.the-d2.com | grep zimbraMtaMyNetworks

# Change the IP with below command (replace hostname and IP accordingly)

zmprov modifyServer zimbra.the-d2.com zimbraMtaMyNetworks '127.0.0.0/8 192.168.12.44/24'

# Now reload and restart your Zimbra services:-

su - zimbra
postfix reload
zmcontrol stop
zmcontrol start