Author Archive for Christian Mollekopf

Synchronization problems with the latest update of the Gmail app on Android

Posted on: November 17th, 2025 by

The latest update on Android unfortunately broke the synchronization via ActiveSync, provided by the Gmail app. This affects not only Email, but also the synchronization of Contacts and Calendars.

If an affected version of the Gmail app is installed, all folders will be continuously re-synchronized from scratch, which results in the temporary availability of the contents, and a continuous stream of notifications for new messages which are downloaded over and over again.

This is a regression of the Gmail app, and unfortunately is not fixable on the server-side.

The following app versions are known to be affected:

– 2025.11.02.828149635.Release
– 2025.10.13.822206885.Release

If you can avoid updating the Gmail app, we strongly recommend that.

To downgrade, the following steps are possible, at your own risk. Please also note that this will remove all configured accounts.

– Uninstall the Gmail app from the PlayStore. This will downgrade the version to the one provided with the OS. You can use this version of Gmail if you like.
– The latest unaffected version is 2025.09.15.810231445.Release, to which you can upgrade after downgrading first. Please note that it is not possible to directly downgrade to this version.

WARNING: The following link is from an external source, and we cannot take responsibility for the content provided. Use at your own risk.
You can find the .apk for latest good version of the Gmail app here https://gmail.en.uptodown.com/android/download/1111199927

Incident: Service temporarily unavailable

Posted on: July 30th, 2025 by

Kolabnow is currently experiencing a service interruption due to a spontaneous hypervisor reboot. We apologize for the inconvenience while we investigate the issue. We will update this blogpost as soon as more information is available.

2025-07-30 @ 22:50 UTC: This issue was triggered by one of our hypervisors spontaneously rebooting at approximately 19:45 UTC, and manual intervention was required to get all services to recover. Most services have been restored, the Operations team is working through remaining issues. Users can login and use the facilities. Some delays in email delivery are expected, no data was lost.

2025-07-30 @ 23:39 UTC: The incident has been resolved.

Changes to Kolabnow password expiry policy

Posted on: July 16th, 2025 by

Today we deploy a change to the Kolab Now password expiry policy, which will affect you only if you:
– have enabled an expiry policy in your profile
– your password expired according to that policy

If both of these conditions are the place, you will be prompted to change your password when you login in to the cockpit with your correct, but expiring, password.

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ActiveSync changes to help with stuck devices

Posted on: July 8th, 2025 by

ActiveSync is the protocol used to synchronize various mobile devices, desktop clients, as well as Outlook.

While mobile device synchronization works mostly without issues via this protocol, Outlook can get stuck in various, hard to diagnose, situations.
This is especially problematic as those situations often are caused by issues invisible to the user. Outlook will simply stop synchronizing partially or completely.

Today we deploy an update with two remediable measures.

1. We force various default folders to always be synchronized, because Outlook does not handle the absence of those folders well.
This is visible in the ActiveSync configuration UI in the webclient:

2. We mark devices that are detected to be stuck in a loop as broken. These devices have to be manually reset according to the procedure outlined in the knowledgebase.

For broken devices Outlook will now report the disconnected state, instead of showing connected while failing to synchronize. This should help to detect this situation and allow you to reset early.

As always, if you have questions or concerns, you are very welcome to contact Support.

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Service interruption

Posted on: March 23rd, 2025 by

Kolabnow is currently experiencing a service interruption which affects receiving of email as well as changes in the administration panel and payments. We apologize for the inconvenience while we investigate the issue.

We will update this blogpost as soon as more information is available.

2025-03-23 @ 14:15 UTC: This issue was triggered by an internal container-image storage issue which prevented services from restarting. The affected storage is unrelated to the storage used for customer payload data. The service interruption caused external emails to be temporarily rejected (as well as the above mentioned symptoms for administration of services). External email systems will re-attempt delivery, so no data should be lost, but some delays are to be expected.

2025-03-23 @ 14:25 UTC: Receiving of email as well as administration functionality has been restored.

Action required for Group managers!: Change to DKIM-Signatures – domain alignment – Errata

Posted on: December 24th, 2024 by

Due to the perils of simultaneous wordpress editing a crucial error snuck into the previous blogpost:

The newly required DNS entries are:


dkim1._domainkey CNAME dkim1._domainkey.kolabnow.com.
dkim2._domainkey CNAME dkim2._domainkey.kolabnow.com.

and NOT as the previous blogpost claimed


dkim1 CNAME dkim1.kolabnow.com.
dkim2 CNAME dkim2.kolabnow.com.

The previous blogpost has been corrected meanwhile.

Apologies, and merry Christmas!

Incident: Service outage

Posted on: November 6th, 2024 by

Kolabnow is currently experiencing a networking infrastructure interruption. We apologize for the inconvenience while we investigate the issue.
We will update this blogpost as soon as more information is available.

2024-11-06 @ 05:44 UTC: This issue was triggered by one of our hypervisors spontaneously rebooting. Most services have been restored, the Operations team is working through remaining issues. Users can login and use the facilities.
2024-11-06 @ 07:17 UTC: The incident has been resolved.

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Bleib sicher Zuhause mit Kolab Now

Posted on: March 22nd, 2020 by

Kolab Now unterstützt alle, die auf Homeoffice nicht vorbereitet sind, indem wir unseren Service für die Dauer der Krise gratis zur Verfügung stellen.

Email, Kalender, Office-Dokumente und mehr, helfen Ihnen Ihre Arbeitsabläufe auch Zuhause aufrecht zu erhalten.

Registriere dich jetzt mit dem Voucher Code KOLABFROMHOMENOW.

Dieses Angebot werden wir so lange wie möglich aufrechterhalten und nachdem sich die Lage beruhigt hat wieder entfernen.

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Kube Campaign: Last Chance

Posted on: August 29th, 2018 by

The proposition of the Kube campaign is the following:

You sign-up now via Kube for a Kolab Now account, and pay only for the currently available feature-set that Kube provides at the moment. The web client will be limited to the same feature-set, but as Kube progresses and covers more features you will also get those features for the web client, while you get to keep your reduced subscription price.

> Continue Reading

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Quick keyboard navigation in Kube

Posted on: August 13th, 2018 by

It was already previously possible to navigate through Kube by moving the keyboard focus using tab and arrow keys, however that is neither fast nor efficient. To be able to really blaze through your Inbox we naturally require VIM style keybindings. To move through the UI we want to be able to go through folders, threads and mails using a single key press, without worrying where the focus currently is.

> Continue Reading

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