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We've published a detailed post-event analysis of the March 4th 2026 outage that disrupted our email services. We sincerely apologize for the inconvenience and thank you for your patience. Here’s what happened, why, and the steps we’re taking to prevent a recurrence:
https://blog.runbox.com/2026/03/post-event-analysis-of-email-service-incident-march-4th-2026/Post-Event Analysis of Email Service Incident March 4th, 2026 - Runbox Blog
On March 4th, our email services experienced a major outage caused by a cascade of hardware failures—multiple disks failed in quick succession, and a critical server went down, impacting virtual services. We’ve since replaced the failed hardware, rebuilt the affected systems, and fully restored service. No user data was lost, and we have been taking immediate steps to prevent a recurrence.
** Status Update **
Some users have experienced lingering login issues with email clients. After boosting IMAP resources and resolving NFS configuration problems, services are now fully restored. We apologize for the inconvenience.
** Status Update **
All systems go and IMAP/SMTP issues have now been resolved. A big thank you to everyone for hanging in there with us. We'll come back with more information.
https://status.runbox.com** Status Update **
Work to rebuild affected disks is progressing, as is identifying and resolving compounding errors.
We expect email services will continue to stabilize over the next few hours and again, we apologize for the inconvenience and delays.
https://status.runbox.com/2026/03/04/email-service-access-issues-5/[Ongoing] Email service access issues – Runbox Service Status
** Status Update **
We continue to move services to new hardware, including peripheral and less critical services. Email access should increasingly normalize. If you are having difficulties connecting via IMAP and SMTP you may try both Runbox 6 and Runbox 7 webmail interfaces at
https://runbox.com.
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Update: No user data has been lost as a consequence of this incident, and queued incoming email is being delivered as quickly as possible.
We apologize for the problems this has caused and are taking steps to prevent something similar from happening again in the future.
** Status Update **
The replacement server is gradually being utilized with new virtual machines that are offloading the existing servers where disk replacements are being finalized.
Email service access is normalizing again and most customers should be able to log into web, IMAP, POP, and SMTP.
Our support system is also impacted but we are working to respond to all requests as quickly as possible. You may log into support.runbox.com to check the status of your request, and please follow status.runbox.com for detailed service info.
** Status Update **
We’re addressing compounding hardware issues including disk replacements. This might cause continued slowness for a few more hours. Note that no user data is directly impacted by these hardware issues. We sincerely apologize for the disruption as we work to restore full service.
