Last week in Kube

  • You can now view “flagged”/”starred” messages per account. This is a short-cut to getting that functionality eventually folded into the todo view (I think…), and allows you to quickly show a list of messages that you have marked as important so you can deal with them. The view works best if there is a small number of marked messages, and you unflag them once you have dealt with them.
  • The experimental flatpak now contains spellcheck-highlighting support based on sonata. There is no configuration (language is autodetected per sentence), and there is also no UI to get to corrections, so it’s primarily useful to spot typos (which is good enough for the time being).
  • Quotes in plaintext emails are now highlighted, which makes for a better reading experiece.
  • Lot’s of enhancements to the todo view, which is now very functional as a day-to-day todo manager.
    • The todo-view now has an Inbox that shows all tasks that are neither done, nor in doing. This allows to go through open tasks from all task-lists, to pick them for the “Doing” list (which represents the set you’re currently working on).
  • Various fixes to the invtation-management code to work correctly with exceptions to recurrences.
  • Kube is now a single-instance application when run with the –lockfile option (as used in the flatpak). This was necessary to to deal with the fact that we can’t start multiple instances of kube in separate sandboxes, because storage and lockfiles rely on PID uniqueness. Starting kube again will now simply hide and show the window of the current instance, which results in the window showing up on the workspace you currently are (which also seems to be more consitent with how Gnome and MacOS behave.
  • The IMAP synchronization got more efficient, primarily enhancing the case where nothing changed on folders.
  • Adapted to source changes in KCalendarCore (so the Applications/19.08 release is now required)
  • It’s now possible to create/remove calendars and tasklists in Kube, and sink can modify the associated color (but there’s no UI yet).
  • Recipients in the email composer can now be moved between To/CC/BCC using drag and drop.
  • Listviews now have subtle fade-in animations, which helps spotting new items.

Kube Commits, Sink Commits

Previous updates

More information on the Kolab Now blog!

“Kube is a modern communication and collaboration client built with QtQuick on top of a high performance, low resource usage core. It provides online and offline access to all your mail, contacts, calendars, notes, todo’s and more. With a strong focus on usability, the team works with designers and UX experts from the ground up, to build a product that is not only visually appealing but also a joy to use.” For more info, head over to:


Author: cmollekopf

Christian Mollekopf is an open source software enthusiast with a special interest in personal organization tools. He started to contribute actively to KDE in 2008 and currently works for Kolab Systems leading the development for the next generation desktop client.

6 thoughts on “Last week in Kube”

  1. Great work.

    Please see bug filed on KDE Phabricator and Bifrost regarding Kube duplicate invitations being sent out to invitees as both Kolab Server and Kube are doing this.

    What do the CalDAV specs say should occur.

  2. As a longtime Kmail/Kontact user, I recently came across to read about kube and tried the flatpak.
    Mail looks great and seems to be fast, but I could not get the *DAV extensions to work.
    1st Problem was that kube obviously presumes that User/Password on *DAV ressources is the same as for email, which is not the case for my setup (email is at my ISP, caldav/carddav are on self hosted baikal server).
    then I created a matching User/PW pair on baikal, but still no success: I can’t access calendar/address book on my baikal server via kube, using the same (approved to work) settings as in kaddressbook/korganizer.
    so my question is: is there anywhere a ressource/forum/mailing list where to find help for kube as a user ?

  3. I note that this post is a year old. Is kube still under active development? It would be great to have a responsive, mobile friendly app on Plasma Mobile.

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