Zimbra Setups

 adduser rhomail
 passwd rhomail

 yum update -y ; reboot
 yum -y install which openssh openssh-server openssh-clients openssl-libs nano rsync unzip net-tools NetworkManager-tui sysstat perl-core libaio nmap-ncat libstdc++.so.6 wget tar bind-utils -y 
 hostnamectl set-hostname "mail.rhomicom.com"
 exec bash
# nano /etc/hosts
# 192.168.0.108 mail.rhomicom.com mail

echo 'mail.rhomicom.com' > /etc/hostname
echo '127.0.0.1 mail.rhomicom.com mail' >> /etc/hosts
hostname mail.rhomicom.com
hostname --fqdn

# Do all DNS settings and MX records on Domain Registrar's DNS
dig -t A mail.rhomicom.com
dig -t MX rhomicom.com

#Install Let'sencrypt CentOS7
yum install epel-release
yum install certbot

wget https://files.zimbra.com/downloads/8.8.10_GA/zcs-8.8.10_GA_3039.RHEL7_64.20180928094617.tgz --no-check-certificate
tar zxpvf zcs-8.8.10_GA_3039.RHEL7_64.20180928094617.tgz
cd zcs-8.8.10_GA_3039.RHEL7_64.20180928094617

./install.sh
#Answer Y to all options
# Answer Yes to Create Domain 
# enter domain rhomicom.com
# enter MX mail.rhomicom.com
# Unconfigured Modules, Choose 7
# Choose 4 to set admin password
# choose r to go back
# choose a to apply all settings
# Wait for system to complete configuration and login

Uninstall

 cd /root/zimbra/zcs-8.8.10_GA_3039.RHEL7_64.20180928094617
 zcs-8.8.10_GA_3039.RHEL7_64.20180928094617]# ./install.sh -u