Applies to: Zimbra Collaboration Suite 10.1.15, 10.1.16 with external object storage (Scality, S3, OpenIO) Summary A regression in ZCS 10.1.15 causes zmpurgeoldmbox to delete external blobs (Scality, S3, OpenIO) after mailbox migration, even when zimbraMailboxMoveSkipBlobs=TRUE. This results in permanent, irrecoverable email data loss on the destination server. A fix is targeted for the 10.1.17 patch release. Until then, do not run zmpurgeoldmbox after mailbox migrations if you […]
Archive | Product News
Patch Release Update: Zimbra 10.1.16
We heard you! Enhanced Backup and Restore has been a top request from your customers, and from you. We know how critical this is for your deployments, and we’re grateful you stayed with us while we delivered on the commitment we made on our product roadmap. Stay tuned — more of those roadmap features are […]
Patch Release Update: Zimbra 10.1.15
Patch Security Severity: Low Deployment Risk: Low We have released Zimbra Version 10.1.15, improving email rendering compatibility while maintaining critical security protections. Zimbra 10.1.15 (Release Notes) We strongly recommend all admins and users to upgrade to Zimbra 10.1.15 for improved stability and enhanced email compatibility. End of Life Notice: 10.0 Zimbra 10.0 will reach End of […]
Emergency Patch Release: Zimbra 10.1.14
EMERGENCY SECURITY PATCH We have released Zimbra Version 10.1.14 to address a critical issue in Version 10.1.13 that impacts IMAP synchronization across multi-server Zimbra environments, causing incorrect message display and synchronization failures. For complete details and implementation guidance, please refer to our release notes: Zimbra 10.1.14 (Release Notes) Customers on Version 10.1.13 Patch Security Severity: Low […]
Emergency Patch Release: Zimbra 10.1.12
EMERGENCY SECURITY PATCH Patch Security Severity: High Deployment Risk: Low This patch fixes a critical security vulnerability related to a Server-Side Request Forgery (SSFR) in the chat proxy configuration. We recommend all users and administrators, especially those on Zimbra versions 10.1.5 to 10.1.11 to apply this update immediately. It will strengthen your system’s stability and ensures […]
Patch Release Update: Zimbra 10.1.11, 10.0.17
Patch Security Severity: Low Deployment Risk: Low This patch updated on August 8th, 2025 includes hotfix for the following editions: Zimbra 10.1.11 (Release Notes) Zimbra 10.0.17 (Release Notes) Hotfix for 10.1.11 & 10.0.17 ActiveSync: Resolves an issue that was affecting the iOS Mail app, ensuring improved functionality for all users. We recommend applying this hotfix for a […]