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Release Notes 5.3

End of support for BlueMind 5.3

In accordance with our release lifecycle policy, the end of support dates for BlueMind 5.3 are :

  • patch support: 10/29/2025
  • security support: 04/29/2026

This version brings new features to facilitate and secure the daily use of mail by users, such as anti-phishing alerts on emails, enriched email filters or recurrence management in the automatic acceptance of resource reservations. Above all, it has undergone many enhancements and optimizations, such as rewriting the backup/restore system, improving S3 storage management or email indexing to enhance the solution's overall robustness and performance, particularly in high-load or high-use contexts.

Upgrade from BlueMind 4

For upgrades from BlueMind version 4, see BlueMind major version update.

Mail​

Anti-phishing security​

A new potentially fraudulent email alert system has been set up in the mailbox:

  • suspicious recipient alert
  • malicious link alert: when the link target is different from the visible text

See the dedicated paragraph in the user guide: Protecting yourself from phishing

Conditional filters​

Conditional filters arrive in BlueMind 5.3!
It's now possible to position several criteria in a single filter and choose whether they should all apply, or at least one of them. This choice also applies to exceptions:

For more information on settings and operation, visit the dedicated page: Applying sorting and action filters.

Search modifications​

To optimize overall operation and eliminate many unnecessary server-side operations, indexing is no longer performed in the "Drafts" and "Outbox" folders, which are therefore no longer taken into account for search results.

Multiple S/MIME certificates​

BlueMind 5.3 offers the option of using one or more PKCS12 files to import user certificates and manage signing and encryption in a differentiated way.

For more information on setting up and configuring certificates :

Calendar​

Resources and recurrences​

Long-awaited improvement in Resource management: recurrences are now taken into account in the automatic acceptance of resource reservations, provided that the recurrence duration does not exceed 12 months.

Administration​

Backing up and Restoring Data​

The backup system, which previously relied on a complete database backup via pg_dump, has been replaced by a save entities as files mechanism. This approach frees you from the dependencies linked to changes in the database schema and optimizes data restoration. From now on, restoration will be carried out by reading these files, without going through a complete database restore (pg_restore). The backup process via pg_dump remains available for disaster recovery purposes, but will not be used for regular DataProtect restoration operations.

Functional consequences :

Importing emails in eml format​

No need to set up a thick client, or have to forward or resend emails to retrieve them from a mailbox: the new import-emls command in our command-line tool makes importing a batch of emails into a folder tree very simple.

To learn how to use the Import emails in EML format command, see our knowledge base file.

EAS 16 protocol​

BlueMind now gives administrators the ability to enable or disable the EAS 16 protocol for their Android users.

See the dedicated paragraph Configure EAS server > Authorize EAS 16 protocol for implementation and the Compatibility page for more details on the benefits of this protocol.

Auditlog​

The Auditlog log analysis tool has been further enhanced, enabling investigation more effectively and rapidly when problems are reported by users, whether they concern the calendar, mail or contacts.

For further information, see Logs - Configuration and analysis

Architecture​

Indexing​

Email indexing has been redesigned to optimize all email handling operations. It is now asynchronous and incremental, so email operations (e.g. moves) are faster, no longer needing to wait for indexing to finish.

Expiration of deleted emails​

The expiration mechanism for deleted emails has been rewritten using a reference count, enabling better performance on these actions.

S3 object storage​

BlueMind now operates better error handling and high latency (>= 100ms) on S3 object storage.

A page dedicated to S3 storage has been added to the documentation area: S3 storage.

KeyDB​

BlueMind continues its work on resilient architectures: directory snapshots used for MAPI are now **distributed by our redis implementation (KeyDB).

Fixes​

BlueMind Webmail (mailApp)​

BM-22141 : Fixed: Company signature not correctly inserted in preview (but visible after sending) when a personal signature is defined but empty.

Old Webmail​

BM-22068 : Fixed: The "CCi" field is not visible in received emails.

AD/LDAP synchronization​

BM-19752: Fixed: High load when directory is unreachable.

EAS​

Fix: Enables ActiveSync synchronization when internal folder usernames exceed 2^31.

SDS​

Fixed: e-mails are not deleted when storage is remote.

Tick​

BM-21992: Fixed: database connection errors by Telegraf add-on.

Miscellaneous​

Fix: invalidate mailbox name cache after renaming to be able to reuse this name for a shared mailbox.

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