Install Zimbra Mail Server Ubuntu 20.04

 1. Setup domain

    - Type: A Host: mail Value: public IP
    - Type: MX Host: @ Value: mail.youdomain.com

2. Update & Upgrade your Ubuntu Server

    - sudo -i
    - apt update && apt upgrade -y 

3. Set Hostname & host

    - hostnamectl set-hostname mail.yourdomain.com
    - sudo -i
    - nano /etc/hosts
        PublicIP mail.yourdomain.com

4. Install DNSmasq & disable systemd-resolve

    - systemctl disable systemd-resolved
    - systemctl stop systemd-resolved
    - ls -lh /etc/resolv.conf
    - rm -f /etc/resolv.conf
    - nano /etc/resolv.conf
        nameserver 8.8.8.8
    - apt install dnsmasq -y

5. Config DNSmasq

    - cp /etc/dnsmasq.conf /etc/dnsmasq.conf.bak
    - nano /etc/dnsmasq.conf
        server= PublicIP
        domain= yourdomain.com
        mx-host= yourdomain.com, mail.yourdomain.com, 5
        mx-host= mail.yourdomain.com, mail.yourdomain.com, 5
        listen-address=127.0.0.1
    - dig -t A mail.yourdomain.com
    - dig -t MX yourdomain.com

6. Install Zimbra

    - wget https://files.zimbra.com/downloads/8.8.15_GA/zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954.tgz
    - tar xvzf zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954.tgz
    - cd zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954
    - ./install.sh (choice Y, waiting full done)

7. Set admin password

    - choice zimbra-store
    - choice Admin Password (set password)
    - r (back to menu)
    - a (to apply)
    - yes

8. Done, access with browser

    - https://mail.yourdomain.com:7071 (Zimbra Admin, for create account etc)
    - https://mail.yourdomain.com  (Web mail GUI)