IceWarp EPOS 3 Server – Release Notes (Versions 14.3.0.5 + 14.3.0.4)

IceWarp EPOS Server – Release Notes

Version 14.3.0.5 | June 15, 2026

This release focuses on new features, stability, performance, and numerous improvements to the core IceWarp Server. It combines improvements and fixes from builds 14.3.0.4 to 14.3.0.5, highlighted below.
Several fixes address issues reported in production environments, including improved Greylisting management, new search features, and the mitigation of possible cross-site scripting and local file inclusion vulnerabilities.

Administrator Impact Summary

NEW FEATURES

• WEBCLIENT - Added a new feature, where search in all folders returns also the results from the Snoozed folder. (build 14.3.0.4)
• WEBCLIENT - Added option to search also in subfolders for the search folders. (build 3.0.4)
• SERVER - Improved Greylisting management by adding automatic cleanup of expired sessions and a bulk deletion option. (build 14.3.0.4)
• SERVER - Added a new feature to display IMAP STATUS in LIST. (build 14.3.0.4)

IMPROVEMENTS & OPTIMIZATIONS

Build 14.3.0.4

• WEBCLIENT - Fixed a possible local file inclusion vulnerability.
• WEBCLIENT - Fixed a possible cross-site scripting.
• SERVER - Improved delivery rules behaviour, if the rule pointed to a renamed or moved folder.
• SERVER - Improved Remote Console behaviour by disabling Header/Footer file selection buttons to prevent unintended use of local file dialogues.

FIXED ISSUES

Build 14.3.0.4

• WEBCLIENT - Fixed an issue with managing custom favourite folders.
• WEBCLIENT - Fixed an issue with unintended scrolling in the compose window.
• WEBCLIENT - Fixed a bug causing the inability to expand the distribution list that has a space in its name.
• WEBCLIENT - Fixed a bug that adds a weird due date to a task.
• WEBCLIENT - Fixed a bug causing visibility of search results in the printed outputs.
• WEBCLIENT - Fixed an issue with deleting contacts from trash.
• WEBCLIENT - Fixed Google Maps integration in the calendar event window.
• WEBCLIENT - Fixed a bug with adding a new attendee to an already existing occurrence.
• WEBCLIENT - Fixed the behaviour of email management while working with search results.
• WEBCLIENT - Fixed an issue causing document version conflicts and data loss when quickly editing and closing files, leading to unsaved changes and temporary document lockups.
• WEBCLIENT - Fixed a scenario where not all users were returned in the IM roster.
• WEBCLIENT - Fixed multiple calendar event editing issues.
• WEBADMIN - Fixed disabling of the Marketplace module.
• SERVER - Fixed an issue causing the undeliverability of emails sent to Mailing lists or groups.
• SERVER - Fixed an issue where outgoing antispam was always processed in 'Full' mode, even when 'Live! Only' was configured. The default value has changed to 'Live! Only' to prevent false-positive SPF matching for local SMTP sessions.
• SERVER - Fixed displaying of quarantined messages in Remote Console.
• SERVER - Fixed an issue where email attachments appeared split.
• SERVER - Fixed unintended saving of API variables in Remote Console.

Build 14.3.0.5

• WEBCLIENT - Fixed an issue with permanent sessions

SECURITY UPDATES

• WEBCLIENT - Fixed a possible local file inclusion vulnerability.
• WEBCLIENT - Fixed a possible cross-site scripting.

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 14.3.0.5. Please include server version, operating system, database type and version and relevant logs when opening a support case.