cannot connect to the zcs upstream server

Zimbra advises that you should install LibreOffice in your server to be able to access its high-fidelity document preview feature when interacting with the package.

For better performance, it is recommended that you use SATA or SCSI and for redundancy, make use of RAID/Mirroring.

An additional installed capacity for mail and files storage, about 50 GB should be good enough for a start.

A minimum of 10 GB installed storage capacity for software and logs.

8 GB of RAM for a single server installation.

Zimbra recommends the following specifications for your VPS to sufficiently meet such a use case: Our objective is to support an organization with about 50 users.

A DNS server installed on your system such as Dnsmasq.

A user with sudo privileges on your ECS instance.

You should have SSH access to your instance.

An Alibaba ECS instance running Ubuntu 18.04 setup.

The system requirements for your VPS are as listed below: So, What Are the System Requirements for the Installation? Our focus in this tutorial is the open source version, which we shall be installing in our ECS instance.

Zimbra Inc, the company behind the software provides both a freely available open-source version and a commercial paid-for version. First launched in 2005, Zimbra Collaboration Suite incorporates both email and web clients to facilitate organizational collaboration. Also, note that you can have a multi-server setup as well but our focus in this article is only the single server setup. Specifically, we shall be installing the Zimbra version 8.8 community edition in a single server setup. In this how-to guide, we shall be looking at how we can set up the Zimbra Collaboration tool in an Alibaba Cloud ECS instance running Ubuntu 18.04. Tech Share is Alibaba Cloud's incentive program to encourage the sharing of technical knowledge and best practices within the cloud community. By Alex Mungai Muchiri, Alibaba Cloud Tech Share Author.

Cannot connect to the zcs upstream server