Zimbra Collaboration Suite

Pros

1. Specially the optimized nature of it to work on limited or lower network connectivity like VPN,

2. Cost effective and Opensource nature.

Cons

User Interface was laggy sometimes. It has sort of older look and feel compared to other open source email collaboration products.

Sometimes it was not able to filter junk mails effectively compared microsoft exchange service.

Pros

1) Can be accessed through any browser like Chrome, Firefox, Edge etc..
2) Can be accessed through Personal Computer and Mobile
3) Inbox folders, addresses, contacts, tasks, calender scheduling dates can be shared among multiple users
4) Can schedule group meetings with a specific date and time using calenders
5) Personal tasks can be assigned or tasks can be assigned in groups. The progress of the task can be specified and the works to do further in regards to the task can also be specified.
6) A specified directory called brief case is available to store our files.
7) Zimlets are available to make the conversations between end to end users in a more formal, more interactive way.
8) Tags can be used to filter out the incoming mails that is to be called out in a particular category.

Cons

I didn't find any Cons. I find the working of this software Swift and smooth with no time lags while loading the incoming mails.

Pros

Its scale-able, robust, secure and low cost. Based on Postfix and other opensource packages it provides good emailing solution. All the included packages are thoroughly tested before included in release. With most of the world going to cloud for email for the organizations need low cost yet secure and scale-able on premise mailing solution Zimbra is a good option. It has very good Web base UI which is very easy to use. There is no performance issues. Visibility with logs is very good . Zimlets are very cool features you can add on

Cons

The support is a bit so so maybe because of change of so many owners of the company. The web ui can use skin option to make it look and feel like different email platform in the market, e.g. if someone is use to outlook or gmail ui then a them/skin could provide that

Pros

Documents can be shared instantly.
We can use Zimbra desktops to obtain Zimbra experience. Sync your Google, Yahoo!, and Outlook calendars.
Zimbra is a BSP hosting partner because of its flexible deployment and virtualization readiness. Vmware Vsphere and KVM hypervisors are also fully supported.
In addition, unlike other email companies, Zimbra's technology never locks me out.

Cons

- Setting up the setup server is a little tricky for system administrators; it necessitates linux administrator knowledge.

- When one service fails, it can affect others, particularly LDAP services.

Pros

To my mind, it is great that Zimbra gives an opportunity to share a calendar among colleagues and customers. It helps us to share all important data and meetings at any time. Another plus is a simple and user-friendly design. It is perfect both for qualified users and people who use it for the first time. And of course, emailing itself is on the top-level. It is easy to customize and make the necessary changes. Zimbra is an open source software with an opportunity to send emails, keep contacts, and make notes in the calendar. This service is perfect for remote work because I can keep an eye on everything and be sure, that everyone knows what they need to do.

Cons

I am convinced that Zimbra has more advantages than disadvantages. However, there are some issues to fix. Firstly, filters are hard to use and understand, because they aren’t flexible at all. Secondly, the software itself is quite hard to operate. Despite all pluses, the service still demands some basic IT skills. Thirdly, there might be some problems with data export and back up, because the software depends on servers.