You have installed Kolab 16 on CentOS7 and you now want to secure it with SSL/TLS. This article describes how to do that with Let’s Encrypt.
This HOWTO is a follow-up on Disabling and Enabling Webmail Plugins in Plesk Premium Email and deals with suppressing the availability of the folders other users share with one another, or global public folders shared with the user.
Sometimes, customers may wish to use, or avoid using, particular plugins in the web client.
This article outlines how to disable and enable plugins for the Plesk Premium Email webmail client for a specific domain.
Organizations that require or desire archiving of their communications often use an external solution distinct from the Kolab environment. Such appliances often support SMTP-based forwarding, and for those cases, this article explains how to configure Postfix such that all email is archived.
Collaborative editing, using Collabora Online, is an additional function that can be added to the out of the box Kolab 16 installation.
This article outlines how to install Collabora Online to a Kolab 16 installation on CentOS 7 or Red Hat Enterprise Linux 7.
A catch-all email address is an address that is used as a fall-back for when no other recipients are available. Ergo, it is the email address that receives all email for a domain that isn’t already delivered to other users or groups or shared folders.
A default Kolab environment is not configured to facilitate catch-all addresses, so this article outlines why and how to configure such a catch-all email address in a way that allows the use of another relatively obscure but very powerful feature — the use of address extensions.
John Doe administers a Kolab Enterprise installation, but the complete environment for what we’ll call “example.com” involves server systems hosted by third parties — such as a web server for the corporate website, and maybe other application servers.
This article outlines the possible solutions to one or more of these environments being restricted somehow.
Domain Keys Identified Mail (DKIM, or Mail Identified through Domain Keys) is a cryptographic technology using which domain owners publish the public keys of public-private key pairs used for signing email messages. This allows third parties to establish a degree of confidence about the message originating from designated and duly authorized infrastructure. In other words, it’s a been there ribbon.
This article explains how to configure a Kolab environment to sign mail messages with DKIM and verify DKIM signatures on inbound email.
Memcache is a protocol to access a simple key-value store, that is memory-backed, over a network socket. The memcached server does not perform any form of access control and is optimal for certain caches used in the Kolab web client (and associated HTTP-based access interfaces), by avoiding superfluous login, access control, and other such software policy considerations, as well as disk I/O.
This article outlines the installation and configuration of a single memcached server for use with the Roundcube web client for Kolab.
The performance of Kolab Groupware web interfaces can be increased significantly by using the Alternative PHP Cache (APC user cache) and OPcache.
This article outlines the installation and configuration of both caches.