Few days ago, i am migrating Zimbra 8.6 running on SLES into Zimbra 8.8 running on CentOS 7 at my client. All installation have been finished. I am try to access Webmail Zimbra 8.8 that running on CentOS 7. But, the webmail can not be accessed by IP address. However, webmail can be accecssed by name like mail.imanudin.net, webmail.imanudin.net and etc.
For solved the problem, perform the following command as Zimbra user
zmprov md imanudin.net zimbraVirtualHostname mail.imanudin.net zimbraVirtualIPAddress 192.168.1.11 libexec/zmproxyconfgen zmproxyctl restart
Note : mail.imanudin.net is virtual hostname and IP Address 192.168.1.11 is IP from Zimbra Proxy Server
Finally, i can access webmail by IP Address
Good luck and hopefully useful 🙂