Incident report: Nameserver issues..

This morning, on Thursday July 23, 2026, at about 06:30 UTC, a problem was triggering the internal nameservers in our infrastructure to stop servicing. This resulted in a domino effect of other internal and external services failing and falling over.

Users would have seen that the Kolab Now web page, this blog and the knowledge base was all available, but the access to data (such as the Webmail client and IMAP) was giving errors like “Proxy error – service not available” or “Access to storage server failed”..

The issue was discovered right away, and the activity state was restored. We are now investigating what caused the original interruption of the nameservers.

At this time, all systems are up and running again. The incident lasted about an hour.

We apologize for any interruption or inconvenience that this may have caused.

Update 2026-07-23 @ 15:02; To mitigate the issue that was showing up this morning, the operations team need to restart the internal nameservers. Please check this blog post about the mitigation.