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Outage in Carbonite

Zix SMB and Secure Cloud Encryption services Receiving "Unbalanced" reject for outgoing messages

Resolved Minor
October 09, 2026 - Started about 7 hours ago - Lasted about 5 hours
Official incident page

Incident Report

Summary AI Generated

Zix SMB and Secure Cloud Encryption services experienced a 5.2-hour outage where all outbound messages were rejected with an "Unbalanced" NDR, leaving emails undelivered. Teams identified the root cause and restored service, which was then validated before being confirmed resolved. The incident was tracked under IM4015057.

Multiple services are currently experiencing an issue where senders of messages are receiving "unbalanced" as a reject/NDR notification. Teams are currently assembled and working to resolve the issue. We appreciate your patience. Tracking Number: forth coming

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Latest Updates ( sorted recent to last )
RESOLVED about 2 hours ago - at 10/09/2026 08:22PM

Zix SMB and Secure Cloud Encryption services experienced an issue when sending outbound messages. Users would experience messages being undelivered, with the NDR showing the issue as Unbalanced.

The issue is now resolved. We appreciate your patience.

Tracking Number: IM4015057

MONITORING about 6 hours ago - at 10/09/2026 04:25PM

Zix SMB and Secure Cloud Encryption services experienced an issue where all outbound messages were rejected for "Unbalanced".

Service has been restored and is being validated. We appreciate your patience.

Tracking Number: IM4015057

INVESTIGATING about 6 hours ago - at 10/09/2026 04:06PM

Zix SMB and Secure Cloud Encryption Services are still experiencing an issue when sending outbound messaging.

Teams have assembled, identified the problem, and are working to resolve the issue as quickly as possible. We appreciate your patience.

Tracking Number: IM4015057

INVESTIGATING about 7 hours ago - at 10/09/2026 03:24PM

Zix SMB and Secure Cloud Encryption services are currently experiencing an issue when senders of messages are receiving a reject notice/NDR with "Unbalanced" as the reason.

Teams are currently assembled and working to resolve the issue. We appreciate your patience.

Tracking Number: IM4015057

INVESTIGATING about 7 hours ago - at 10/09/2026 03:12PM

Multiple services are currently experiencing an issue in which message senders are receiving "unbalanced" as a reject/NDR notification.

Teams are currently assembled and working to resolve the issue.

We appreciate your patience.

Tracking Number: IM4015057

INVESTIGATING about 7 hours ago - at 10/09/2026 03:09PM

Multiple services are currently experiencing an issue where senders of messages are receiving "unbalanced" as a reject/NDR notification.

Teams are currently assembled and working to resolve the issue.

We appreciate your patience.

Tracking Number: forth coming

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