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