Main features

High Availability (HA) cluster instances

We are introducing native High Availability clustering for virtual machine instances. With this release, two VMs can be paired into a resilient HA cluster, ensuring service continuity and maximum reliability.

Key highlights:

• active/passive architecture: the active node continuously synchronizes all data and configurations to the passive node, ensuring both remain fully aligned
• seamless failover: administrators can promote the passive node to active at any time, guaranteeing uninterrupted service in the event of planned maintenance or unexpected outages
• independent identity: each node maintains its own IP address and hostname, simplifying network integration and monitoring
• non-disruptive operations: clusters can be dismantled at any time, allowing the active node to continue operating without service degradation

This feature significantly strengthens resilience, minimizes downtime, and offers enterprise-level fault tolerance.

Advanced attachment indexing

Libraesva Email Archiver has been enhanced to support full-text indexing of attachment content, extending search capabilities far beyond email bodies and filenames.

Key highlights:

• comprehensive search: by default, both message bodies and attachments are indexed and searchable
• broad file format coverage: PDF, Microsoft Word, Excel, PowerPoint, text files, and HTML
• tenant level configuration: a new administration page allows attachment indexing to be enabled or customized per tenant

New reports

A comprehensive set of new reports has been introduced to provide deeper insights into system usage, security, and archiving trends. Reports are delivered in spreadsheet format and, where applicable, include charts for easier data visualization.

List of new reports:

• license usage by user and connector: shows all active users per tenant and the connector from which each user originates
• user forward statistics: includes counts of download, restore, and forward actions
• mail distribution over time: provides message volume per year and month, with charts similar to the “archived mails per day” dashboard; charts can be generated based on sent date or archived date, either globally or per tenant
• connector sync time: reports average and detailed synchronization times per user
• license usage by tenant: tracks historical license consumption across tenants
• search activity: lists the number of searches performed by each user
• 2FA compliance: identifies users without two-factor authentication enabled
• impersonation rights: details which accounts have permission to impersonate other users
• administrators overview: provides a list of admin accounts with their configured capabilities

Features

• hidden folders: option for users to hide specific folders when browsing their mailbox folder structure in the Archiver
• connectivity health page: new page displaying connectivity status and checks against all required Libraesva services
• reindex job quick start: option to skip job detail checks and start a reindex immediately, useful when the API response time is long
• job logs: always allow to download job log and automatically retrieve old logs from volume logs
• import – MSG format: support for importing messages in MSG format
• import – multipart zips: support for importing multipart ZIP archives
• import – MBOX files: support for importing MBOX mail archives
• user impersonation management: new functionality to configure impersonation rights in both directions between accounts
• connector page controls: added button to terminate running connector synchronization or cleaning processes
• export by folder and subfolders: option to include all child subfolders of the selected folder in exported data
• dedicated tenant journaling address: introduced to handle Google journaling behaviors; each tenant can now have a unique journaling email address, displayed in the tenant page
• notifications page redesign: notifications are now organized in three tabs — active, read, and snoozed
• file tagging on volumes: all files uploaded to volumes are automatically tagged when the object storage system supports tagging
• faster oauth2 login: login page now suggests the most recently used Microsoft 365 or Google account for quicker access
• double-bounce purge engine: automated process to purge double-bounce messages from the mail queue
• network speed monitoring: new engine to continuously monitor network throughput
• always download images option: users can enable or disable automatic image download when opening emails, configurable from the profile page

Security

• cloud appliances – enforced password change: administrators are now required to change the default password at first login, strengthening appliance security
• enhanced audit log for mail deletions: Archiver now records detailed metadata for all deletions (manual and retention-based), including message date, deletion date, message-id, sender domain, and recipient domains. Manual deletions also include a reference in the audit log for traceability
• dedicated restore capability: introduction of a specific capability for email restore operations, allowing finer-grained control over administrator and user permissions
• mandatory two-factor authentication: administrators can now enforce 2FA activation for users, ensuring stronger account protection across the platform

Improvements

• import/export concurrency limits: maximum number of concurrent operations can now be limited; if exceeded, jobs are queued and a warning is shown in the UI
• legal hold rule processing: new background job runs every 15 minutes. When legal hold rules exist, users and retention rules cannot delete emails newer than the last run
• database optimization: improved automatic weekly optimization for better performance
• connector scheduling: increased reliability when scheduling newly configured connectors
• ea installation wizard: automatically redirects to the login page after installation completes
• postfix notifications: disabled per-message delivery failure notifications and resource/software error alerts, reducing noise and avoiding mail loops. Error management is handled internally
• weekly scheduling info: UI now clarifies that weekly connector schedules push users to the queue every Friday at 8 pm
• SMTP listener credentials: added validation to detect duplicate credentials across tenants, with clear UI error messages
• LDAP configuration: query strings longer than 255 characters now trigger a warning message
• license page improvements: redesigned to display all relevant license usage information in one place
• faster folder searches: optimized search performance within mailbox folders
• export folder structure: exports now include the full root directory and all nested folders
• tenant hard delete: operation now also removes temporary archived data and metadata automatically
• connector types UI: improved alignment and color coding for connector type indicators

Bugfix

• PST batch restart: resolved an issue where restarting a PST batch action did not correctly restart all failed or missing PST files in some cases
• tenant reports generation: fixed an error that prevented tenant admins from generating certain reports
• PST download after export: corrected an issue that could block PST file downloads following an export

Breaking changes

• S3-compatible volumes: Archiver now uses AWS Signature Version 4 (SigV4) for S3 requests. Please make sure your S3-compatible storage supports SigV4 before updating your Email Archiver.

How to update

In Settings > System > General section, you can either update the Archiver immediately or schedule the update for the upcoming night.

Minor updates

v25.8.4423 released on 2025-09-23

• Attachment indexing: added supported files list in configuration page
• Attachment indexing: added support for CSV and XML files
• Attachment indexing search: enabled keyword “attach:” to search within attachments
• Audit log: reviewed and improved log descriptions
• Batch import jobs: jobs hanging for 24 hours are now stopped automatically
• Export jobs: email notification sent when export completes
• Import jobs: improved final email with clear success/failure status
• Backup: increased timeout for large database backups
• Favicon: updated to include transparency
• Folder info: fixed visibility issue for impersonated users
• Reindex: fixed failure on long jobs processing latest ZIPs

v25.8.4450 released on 2025-10-01

• Journaling archiving: improved parallelism handling for better performance
• Web server: revised configuration to support more concurrent users searching emails
• Batch import jobs: entire job marked as failed if a single PST process doesn’t update within 24h
• Reindexer: automatically ignores non-ZIP files
• Connector archiving: improved performance with attachment indexing enabled
• Cluster status: engine improved to tolerate temporary connection errors
• Backup: increased allowed time to prevent timeout on low-volume connectivity
• SNMP: improved OID for archived emails count to return 0 when indexing engine is down
• Dashboard: introduced new major version alert
• Email search: fixed forward and delete buttons for legacy search
• Dashboard charts: increased statistics computation frequency to fix timezone-related zero-mail issues
• Indexing engine: improved log rotation to prevent disk space issues
• PST batch import: old running files are now shown as failed if batch job fails
• Archiver swap engine: introduced max dimension limit
• Status page: now checks for new version immediately on load
• Archiver update: faster update by skipping local configuration backup if at least one backup rule is enabled
• Connector statistics: paused sync are now shown in yellow instead of red during upgrades
• Attachment indexing: fixed for encrypted PDFs
• Attachment indexing: fixed for Excel files without text
• Attachment indexing: increased max length for Office files
• Attachment indexing: faster text extraction from Word files
• Customer hard delete: fixed deletion with directory service custom users
• Office 365 validation: fixed wrong additional user emails reporting

v25.8.4458 released on 2025-10-06

• Journaling archiving: improved performance under high load (1.5 million emails/day)
• PST batch import: enhanced error reporting with clearer handling suggestions
• SNMP monitoring: added timeout to archived email count OID to prevent false engine down alerts
• Indexing engine: improved performance during nightly optimization process
• Archiver scheduled services: distributed cron jobs over time to balance Archiver load
• Indexing engine notifications: avoid unnecessary indexing engine down alerts after Archiver reboot
• Dashboard: fixed “Archived mails per day” chart showing incorrect data for the last day

• Outlook Add-in: new authentication using MSAL, new configuration page on Archiver and support for logout/re-login. Requires reconfiguration and redeployment
  • Configuration guide: https://docs.libraesva.com/document/configure-office-365/configure-outlook-add-in-on-office365
  • Deployment guide: https://docs.libraesva.com/document/configure-office-365/4-install-outlook-add-in-on-office365/
• Volume configuration: added optional Content-MD5 flag, which can be enabled or disabled depending on S3 compatibility
• PST batch import: improved performance with lazy loading of file list
• PST batch import: introduced compacted view for better readability
• Archiver update alert: improved stability, now remains visible until update is fully completed and UI is stable
• Webserver service: improved configuration to allow opening large emails on web interface
• Email display: improve layout to better show emails with large recipient or attachment lists
• Archiving process: improved logging to correctly report upload errors
• IMAP logs: cleaned up unnecessary log entries
• License card: added cluster information display
• Batch import job: fix temporary issue in saving job completed status when process completes
• License usage report: fixed incorrect data calculation
• Scheduled reports: fixed configuration issue for scheduled reports created before v25.8
• Postfix restart: fixed permission issue for smoother restart after resuming archiving process
• Folder structure volume: fixed cleanup of old uploaded files not being removed in some cases
• Archiver update: fixed issue where update could terminate running jobs
• Export jobs: fixed failures occurring when handling large or long-running export jobs that could exceed system limits
• Retention rules: fixed “Force action” not working for emails with sender addresses longer than 256 characters (RFC max length)

• Email ingestion: improved performance by 20% on VMs with more than 64 cores, optimizing resource utilization
• Indexing engine: added chart displaying indexing growth over time for easier monitoring
• PST batch import: improved error visibility and clarity in both job summary and UI messages
• PST batch import: enhanced log handling when importing unsupported files, with clearer user feedback
• PST batch import: immediate status update for all files when a job is manually stopped from the UI
• PST batch import: optimized job ordering to process larger files first, improving overall batch speed
• PST batch import: refined progress calculation based on total archive size instead of file count
• PST batch import: added specific message when listing files during full-folder import
• PST batch import: increased maximum concurrent imports on high-core VMs to better leverage system resources
• Dashboard storage: now shows both compressed and uncompressed data to highlight compression ratio
• Volume validation: improved error feedback with detailed remote storage information
• Cluster setup: added pre-sync step during initial setup to prepare data without using extra disk space
• Purge job: improved resilience by skipping temporary zip issues without interrupting the job
• Background jobs: reviewed cron priorities to improve low-priority task execution while preserving high-priority performance
• Connector inactivity alert: refined notification text for better clarity, lowered from warning to info while maintaining email alert
• Export configuration: set maximum PST/ZIP export size to 5 GB to maximize performance and minimize disk utilization
• Outlook add-in: improved manifest generation for smoother multi-deployment scenarios
• Hypervisor console: enhanced cluster menu to immediately show which options are included in the license
• Saved searches: improved saving process for complex searches using multiple filter groups
• PST import logs: refined filter and highlight behavior for better usability when no filtered entries are found
• Archiver logs: improved handling of quoted-printable encoded emails, removing unnecessary warnings