Incident report: Spam attack..

Posted on: March 6th, 2026 by

On Tuesday 2026-03-03, a number of user accounts on Kolab Now was used to send out large amounts of spam. The spammers didn’t get to send out much mail. Most of it was stopped in the Kolab Now exit filtering, but the spam rating of the mails going out unfortunately was high and caused Microsoft online services, specifically outlook.com, hotmail.com, to add two of the Kolab Now exit IP addresses to their block lists. This caused emails sent to recipients on these services to bounce with messages like:

550 5.7.1 Unfortunately, messages from [212.103.80.154] weren’t sent.

Please contact your Internet service provider since part of their network is on our block list (S3150).

The spammers were identified and stopped, but the damage was done.

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Doing things right…

Posted on: March 2nd, 2026 by

As you read in the previous post, Kolab Now is moving to new hardware. Over the past months we have put quite a portion of work into this project, and we are just about to be at the finish line.

To make absolutely sure that we are delivering the best possible service and minimal downtime during the migration window, we have decided to give our preparation at least one more week. This means that they migration to the new hardware will happen earliest on:

Monday, March 16, 2026.

The exact time plan with expected downtime will be announced ahead of the service window, but service interruptions are expected.

This blog will be available during the service window, and we will update it with status messages about the work.

We are looking forward to bid you welcome to the new infrastructure, and thank you in advance for your patience.

What’s going on?

Posted on: February 13th, 2026 by

It is Friday..

..and it is time to give you a short update on something that we have been working on for a while.

Kolab Now is running on high-end equipment located in a data-center in Bern, Switzerland. It is running the Email- and Groupware services for our customers, such as you. Where as we are aware that Email is ‘mission critical’ for our users, we do what we can to keep the service stable and alive 24/7.

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Transparency reporting..

Posted on: January 13th, 2026 by

For the sake of transparency we used to report on our interactions with authorities every year. Unfortunately we have missed a few of those reports. Some users missed such updates, and , not only for those users, but also according to our terms of service, and for the sake of transparency, we want to restart this good routine. This post is the transparency reporting for the year 2025.

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Jingle & Join: The Kolab Now Referral is ON (fire)

Posted on: December 5th, 2025 by

It is almost this time of the year again –  “one horse open sleigh” bells start to ring and the festive mood fills the air.

As always it is also the season of giving and this year giving privacy pays off 🙂

 

How it works

Share your personal Jingle&Join Referral Code with a friend and earn CHF 20 once your person/persons topped up their wallet with CHF 10 – offering 50% discount for the first 3 months of usage.*

Step by step

  1. Navigate to your wallet
  2. Find your personal Jingle&Join Referral Code (link)/ QR-Code
  3. Copy that link and send it out to your friends, offering them 50% discount for the first 3 months of usage
  4. For every successful sign-up with a topped up wallet of min. CHF 10, you earn CHF 20 (Kolab Now will add this to your wallet)

If you are still looking for a meaningful gesture during this Jingle bells season –  Jingle&Join Referral is ON.

Spread joy – not data

We wish everyone lovely pre-Christmas days.

 

*The Jingle&Join Referral Program will be active until 31.01.2025

 

Stay in Sync as a Family with Kolab Now

Posted on: November 21st, 2025 by

Running a family is a team effort! Between school schedules, grocery lists, birthdays, chores or appointments there is always something to remember – and to share.

A lot of parents choose big-tech apps for coordination, but with Kolab Now you can keep your family organized and your data private. Here is how you can use Kolab Now features like calendars, tasks and notes to stay perfectly in sync.

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Incident report: IMAP client service temporarily unstable..

Posted on: November 20th, 2025 by

Last night at 21:50 UTC a large number of client connections hit Kolab Now, which resulted in the IMAP client servers (‘imap.kolabnow.com’) running out of memory. Staff was noted about the issue at 06:00 UTC, and immediately raised the amount of memory for these servers, which brought the issue to an end.

During these ~8 hours users of IMAP clients had issues with unstable connections; some might even have been completely unable to connect.

Mail transport was not impacted. all mails were streaming in and out as they should, and also the webclient (‘https://kolabnow.com/apps’) worked well during the period.

The issue was the unusually large number of incoming client connections. To mitigate the situation and avoid similar issues, the staff has enlarged the memory size on the servers in question, and are now working to improve the monitoring of the service.

We regret the incident and apologize for any inconvenience that this may have caused.

 

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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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