IceWarp EPOS 3 Server – Release Notes (Versions 14.3.0.8 + 14.3.0.7)

IceWarp EPOS Server – Release Notes

Version 14.3.0.8 and 14.3.0.7 | June 21, 2026

This release focuses on stability and security in core IceWarp Server services.

Administrator Impact Summary

New Features

• none

Improvements & Optimizations

• none

Fixed Issues

• SERVER - Fixed an issue with resolving target host in distributed domain and static routes
• SERVER - Fixed an issue with missing backgrounds and logos in WebClient

Security Updates

• Fixed multiple vulnerabilities to prevent targeted attack on IceWarp Server

Breaking Changes & Deprecations

• none

Upgrade Notes

• Downtime required: Yes (service restart required)
• Estimated downtime: Up to 15 minutes when upgrading from 14.2.X
• Backup recommendation: Full configuration and data backup before upgrade
• Rollback supported: No

Compatibility & Configuration Notes

• No changes to default configuration values.
• Fully compatible with existing LDAP and Active Directory integrations.
• No changes to supported browsers for WebClient.

Supported systems

• Windows Server (2016 or newer) and Linux (RHEL 8/9, Rocky Linux 8/9, CentOS Stream 9)
• Outlook Sync (14.1 or newer)
• IceWarp Desktop Client (10.0 or newer)
• IceWarp FileSync (14.1 or newer)
• IceWarp mobile (5.0 or newer) and Authenticator (1.1 or newer)

Support & Feedback

If you experience any issues after upgrading, contact IceWarp Support and reference IceWarp Server 14.3.0.7 or 14.3.0.8. Please include server version, operating system, database type and version and relevant logs when opening a support case.