Zimbra - Powerful and reliable collaboration suite
We use Zimbra in an University and email are fundamental here. Zimbra allowed us a way to increase the collaboration between teachers, students, and even our workers, allowing them to share files, their agenda, and any information to improve their work.
- You can share your mail folders, contact and task lists, work together on a text file, all that defining what kind of level of share a person can have, from view to full control of it.
- Great search engine that allows you to search even inside some types of archives (pdf, txt, etc). And in the paid version, you have a working backup system.
- Supports external connectivity like IMAP/POP.
- Multi language support and possibility to expand it using plugins are also available.
- Supports several platforms and you can use the one that you are most familiar like Ubuntu, Red Hat, CentOS, Suse, etc.
- Support external authentication (LDAP).
Cons
- User web interface could be more friendly, but it is enough for daily use. It could be renewed and has to consider some usability concerns. Improving usability would significantly improve users' satisfaction.
- Message backup recovery is not a simple activity.
- As an administrator, some of the features work better using the command-line interface.
- The webclient uses ajax requests in almost every event. Because of that you may need a fast internet connection to have a good experience. You can switch to HTML version but it will limit what you can do.