Groupware Core 8.7.1
The 8.7.1 release of Kopano Groupware Core is a bugfix release, resolving (amongst other things) the caching issues that some customers have encountered after installing version 8.7.0. This also includes the issue where emails that have been read are later marked as unread again. If you were affected by this issue, make sure you run the applicable kopano-dbadm command after upgrading (more details in the changelog).
WebApp 3.5.6
The newest release of WebApp introduces a handful of fixes and improvements that make life easier. The rules/mail filters functionality has been extended with support for new rule triggers as well as actions.
DeskApp 2.3
A number of improvements and bugfixes around the handling of downloads has been introduced, for example, the ‘clear download history’ function and the opening of downloaded files if desired.