Kolab is an open source groupware solution. It consists of the Kolab server and a wide variety of Kolab clients, including KDE PIM-Suite Kontact, Horde Webfrontend, Mozilla Thunderbird and Mozilla Lightning with SyncKolab extension and Microsoft Outlook with proprietary Kolab-Connector PlugIns.
Kolab adds intelligent interaction between the components, a web administration interface, management of free-busy lists and more. Major components of the Kolab Server are OpenLDAP, Postfix, Cyrus IMAP, Apache, SASL, and OpenSSL.
It supports mixed client environments (Outlook/KDE) because of an open storage format. Any email client speaking standard protocols can be served.
Kolab2 Server uses the OpenPKG environment to provide a constant base across multiple platforms and distributions.
Features include:
- Full seamless support of mixed clients environments (Outlook, KDE, Web etc).
- Support for the K Desktop Environment with Kontact.
- Support for Microsoft Outlook with proprietary connector PlugIns.
- A web administration interface.
- Configuration data is kept in a LDAP directory.
- A global LDAP adressbook for contacts.
- IMAP4rev1 as well as POP3 access to mail.
- Full support for client-side PGP and S/MIME email encryption (officially Sphinx-interoperable).
- Full support for shared calendars with IMAP ACLs.
- Full support for shared contacts with IMAP ACLs.
- Fully offline capable using KDE Kontact or Microsoft Outlook.
- Support for server side resource management (e.g. rooms, cars).
- Full support for freebusy handling.
- Cross-Folder-Search.
- Birthday Calendar that automatically shows the birthdays of all your contacts from your address book in one neat calendar.
- Dedicated Out-of-Office settings where you can specify when you are in vacation and which message should be sent under which circumstances.
- Email tags.
- Notes.
- Folder management.
Website: www.kolab.org
Support:
Developer: The Kolab-Project and the Kolab-Konsortium
License: Various freely distributable licenses
Kolab is written in C++ and PHP. Learn C++ with our recommended free books and free tutorials. Learn PHP with our recommended free books and free tutorials.
| Popular series | |
|---|---|
 | The largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions. |
 | Hundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information. |
 | The Big List of Active Linux Distros is a large compilation of actively developed Linux distributions. |
 | Replace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS. |
 | Awesome Free Linux Games Tools showcases a series of tools that making gaming on Linux a more pleasurable experience. This is a new series. |
 | Machine Learning explores practical applications of machine learning and deep learning from a Linux perspective. We've written reviews of more than 40 self-hosted apps. All are free and open source. |
 | New to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux. |
 | Alternatives to popular CLI tools showcases essential tools that are modern replacements for core Linux utilities. |
 | Essential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users. |
 | Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine. |
 | Surveys popular streaming services from a Linux perspective: Amazon Music Unlimited, Myuzi, Spotify, Deezer, Tidal. |
 | Saving Money with Linux looks at how you can reduce your energy bills running Linux. |
 | Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum. |
 | Now and Then examines how promising open source software fared over the years. It can be a bumpy ride. |
 | Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged. |
 | Linux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery. |
 | Getting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers. |
 | Best Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series. |
 | These best free books accelerate your learning of every programming language. Learn a new language today! |
 | These free tutorials offer the perfect tonic to our free programming books series. |
 | Linux Around The World showcases usergroups that are relevant to Linux enthusiasts. Great ways to meet up with fellow enthusiasts. |
 | Stars and Stripes is an occasional series looking at the impact of Linux in the USA. |