Install & configure Zimbra Open Source Mail Server on CentOS 6.X / RHEL 6.X

Zimbra is a Free Email Server and Calendar & collaboration solution, built for the both public and private cloud. It is also considered an Exchange replacement. Zimbra provides a web GUI from where mailserver admin can manage zimbra server. Zimbra provides end users with a feature-rich browser-based experience that enables them to seamlessly and securely connect to their emails on any device or platform.