These are install requirements that I personally use when I'm playing with lab/production Zimbra open source mail servers:

- CentOS OS (minimal ISO) - base OS for Zimbra installation from

- 8GB+ RAM, 10GB+ HDD, 2+ vCPU

Zimbra installation:

DISABLE POSTFIX FROM BASE CENTOS INSTALL WHICH COMES BY DEFAULT - systemctl stop postfix / systemctl remove postfix

disable iptables firewall - assumes you have some other firewall at public side for your mail server

set selinux adequately at /etc/sysconfig/selinux

setup local DNS adequately at /etc/hosts - you must resolve domain names which you are going to use in mail server so that system successfully works - even installer checks for resolvable hostname via DNS

tar xzvf [zcsfilename.tgz] - unpack previosly downloaded file from

cd [zcsfilename]

./ - begin installation process and follow required steps

type X to see complete main menu and additionaly configure items with asterisks (****) - ie admin password!

Admin URL - https://[]:7071

setup adequate DNS checks in Global settins --> MTA tab!

setup volumes for storing mails in Configure-->Servers-->Volumes - you don't want to use default /opt/zimbra folder!

Useful settings:

- zmcontrol status - all zimbra services display (su - zimbra - so that you execute this cmd as zimbra user)

- zmprov mcf zimbraMtaSmtpdRejectUnlistedRecipient yes

- zmprov mcf zimbraMtaSmtpdRejectUnlistedSender yes

- zmprov ms [] zimbraMtaLmtpHostLookup native - check for attribute inside zimbra ldap

- zmprov mcf zimbraMtaLmtpHostLookup native - in case of single server change in global config also required

- zmmtactl restart

- zmconfigdctl restart

- install webmin, htop tools for quick system support...

Create user accounts and publish A/MX records of your new mail system - it's gonna work...


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