Incident Report: DNSSEC record expired

On Saturday morning (CET) the DNSSEC records expired on one of our DNS servers. This caused a group of customers to have troubles logging in and connecting to Kolab Now services. The record has been renewed and all customers should have access (at 22:49 CET – Please read below).

As not all DNS servers are performing DNSSEC calls to our DNS server, only a small group of customers were impacted.

The issue was realized at Sunday afternoon (CET), and the DNSSEC record was updated right  away; at 17:49. The ‘Time To Live’ (ttl) for these records are on some DNS servers up to 5 hours. For that reason, some customers would only have gained access to the Kolab Now services as late as 22:49 (CET).

Should you still have troubles with DNSSEC and Kolab Now services, please – as always – contact

We apologize for any inconvenience this incident might have caused.



One thought on “Incident Report: DNSSEC record expired

  1. I’m happy for the incident report, now I know what has happened.
    But how can we email that email address when DNS is down?
    How can we be assured that it’ll arrive at the right address since DNSSEC is down?
    Do you now monitor for expired DNSSEC keys?

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