Libraesva ESG v5.2: Release Notes – LibraCyber - Help Center

Table of Contents

Main features of version 5.2

Relay focused interface.
Advanced sender and recipient rules for every feature.
New integration connectors with advanced testing.
Introducing functional users.
Improve security and user management with primary addresses.
New licensing accounting with mailbox identification.
Use inclusive feature names for user oriented configurations.

Version 5.2.31 (Sep 16, 2025)

Security

Mail scanner: fixed CVE-2025-59689
System upgrade: new upgrade system with asymmetric signature validation and encryption
Passwordless: removed old authentication systems (may need re-login)
API authentication: removed old authentication systems (may need re-login)
Remote support: removed the old remote support connection via port 25

Version 5.2.30 (Jul 31, 2024)

Security

Bitdefender: update to version 3.7.1
Savapi: update to version 4.15.22

Version 5.2.29 (Jun 25, 2024)

Bug fixes

Email continuity: fixed download for non-binary attachments (regression of 5.2.28)

Version 5.2.28 (Jun 12, 2024)

Improvements

LDAP integration: changed default property for group aliases
ESG cloud: notify about upgrade to ESG 5.3
ESG console: enable SSH service

Bug fixes

Email continuity: fixed download for binary attachments

Version 5.2.27 (Jun 3, 2024)

Security

Improved 7zip support
Attachment Filters: added “.ace” and “.lz” to blocked extensions

Version 5.2.26 (May 28, 2024)

Security

Authentication: extended Nonce protection on all login method

Improvements

Quarantine: reduced I/O required to store quicksand and infections

Bug fixes

Quicksand: allow embedded xml in PDF documents
Mail Intercept: fixed reading of on-hold messages
Reset password: fixed default page for any users after successfully reset
DKIM Signing: not invalidate keys when all links are phishing safe

Version 5.2.25 (May 13, 2024)

Security

QRCode: extract and analyse URIs hidden in query strings
QRCode: added more content-type identified as PDF entities (e.g. x-pdf)

Improvements

User Action: added back to homepage button
Mail log: improve database efficiency by ignoring dynamic verification deliveries flagged as status=deliverable/undeliverable
Quicksand: reduced cache expiration to increase cache-hit ratio

Bug fixes

Database: always execute optimization once time a week
Manual upgrade: verify cluster status in pre-upgrade checks
LDAP Integration: automatically append default domain to Domino additional emails
Mail Signature: apply per email-address, if available, instead of domain/default
Outlook addin: fixed login for users that use primary email instead of username
Google Integration: fixed “Filter by address” search for users groups
User Management: fixed edit of user email

Version 5.2.24 (Apr 22, 2024)

Improvements

Dashboard: highlight bounce messages in top senders
Dashboard: optimize top sender and top recipient loading time
Cluster setup: added percentage progress during cluster restore

Bug fixes

Backup: fixed restore Lets Encrypt configuration on newly created appliance
Scheduled Report: fixed title of PDF report
OpenDMARC: add memory protection limits
ClamAV: use non-blocking reload only when sizing is Medium or above

Version 5.2.23 (Apr 8, 2024)

Security

QRCode: detect numeric IPv4 URL
QRCode: handle evasion attempts based on different Content-Type and Content-Disposition

Improvements

Logwatch: added release/rescan counters
Change timezone: avoid reboot when the actual timezone doesn’t change
Cluster setup: better update of setup progress
Cluster monitor: show warning when the remote node has replication issues

Bug fixes

QRCode: fixed memory disk usage issue on PDF image extraction
Maillog: ignores invalid date ranges caused by daylight savings time
Message details: identify Libraesva blacklisted URL

Version 5.2.22 (Mar 26, 2024)

Security

QRCode: detect and analyze images in PDF documents

Improvements

Outlook addin: use threats as default filtering option
ESG console: allow to query A/MX/TXT for any domain via console
LDAP Integraion: import Active Directory shared mailbox and Domino mail-in-databse as functional users.
ClamAV: use non-blocking reload when enough RAM is available
Logwatch: updated configuration to handle more mail scanning and DNS logs
Risk score: fine tuned score for high-spam messages which contains viruses

Bug fixes

MTA Smarthost: when creating a rule for email address, don’t automatically add a rule for the related domain
Bulk Mail Management: fixed loading of sender/recipient of blocked bulk mail for blocklist
URLSand: avoid log warning when spurious href without value are found
User spam levels: evaluate case-insensitive email when applying custom score overrides
User Management: fixed display issue for delivery time 08:00
User Management: fixed “Delete all” action
Dashboard: Do not include pending messages in the quarantined counter in the “Email Flow” graph
DMARC: optimized management of used memory
Clamw whatchdog: wait longer during signatures reload, before attemping a service recovery

API

IMPROVEMENTS: add boolean property otpEnabled to GET /user/{id}

Version 5.2.21 (Mar 5, 2024)

Security

ClamAV: upgrade to version 0.103.11
Bitdefender: update to version 3.5.5
Savapi: update to version 4.15.20

Improvements

TLS Encryption: log outbound activity by default
Cluster setup: avoid storage usage spike during first quarantine sync
Cluster setup: reset all caches before reconfiguration
Cluster setup: improved database cloning and quarantine synchronization
DKIM: removed internal useless header DKIM-Filter

Bug fixes

Outlook Addin: fixed auto login from Microsoft 365
SMTP Auth: properly reconfigure users realm when MTA hostname is changed
SMTP Auth: fixed replication of passwords in cluster setup

Version 5.2.20 (Feb 20, 2024)

Bug fixes

Backup: fixed local backup creation (regression of 5.2.19)
Manual upgrade: prevent upgrade during cluster setup/destroy
Manual upgrade: suspend system upgrade during manual upgrade
Dictionary: fixed visualization of dictionary names

Version 5.2.19 (Feb 13, 2024)

Security

Quicksand: improved PDF sanitization

Improvements

Manual Upgrade: keep MTA active during version upgrades
Manual Upgrade: automatic backup before start the version upgrade
Local DNS: optmized memory usage for cached resolutions

Bug fixes

Mail Encryption: fixed configuration of action for encryption policies
Microsoft 365 integration: use license technical contact for system notification from cloud appliances
Digest Report: fixed redirection of old 5.1 [Blacklist] link
Digest Report: properly show recipient & action urls for messages with multiple recipients with digest enabled in the same hour
Whaling Protection: permit multiple whale with the same email address and different full name
Outlook Addin: fixed login for new users
Quarantine Settings: fixed validation of “Report Link URL” to permit custom port

Version 5.2.18 (Jan 23, 2024)

Security

Quicksand: improved PDF sanitization

Improvements

Check Firewall Ports: added separate DNS TCP firewall check for port 53
Trusted Network: supersede option “Restrict Sender Domain” with new option “Mail service type”

Bug fixes

Account Takeover Protection: hide menu in quota tracking pop-up
Account Takeover Protection: fix race condition on new quota tracking
User messages: prevent CR to be added at the end of body lines
Azure agent: disable hostname probing to avoid network reloads
Message details: extends Machine Learning indicator to all Bayes and CRM114 rules
Adaptive Trust Engine: avoid duplicate tracking of welcomelist/blocklist action
OpenDKIM: fixed an MTA delivery issue when there are no keys enabled

Version 5.2.17 (Jan 3, 2024)

RBL: moved SpamCop from SMTP to Content checks

Bug fixes

SASL LDAP: fix filter token %d to properly use domain part or default realm

Version 5.2.16 (Dec 12, 2023)

Improvements

Antispam engine: reduced cache lifetime to improve accuracy when scanning newsletters
Queue cleaner: speed up cleaning huge number of queued messages

Bug fixes

Mobile APP: fixed Google OAuth2 authentication
Report: fixed report generation with default Saved Search (regression of 5.2.15)
Queue cleaner: allow script to remain active for a long time when cleaning
User Management: fixed “export” of users

Version 5.2.15 (Nov 28, 2023)

Security

DMARC: consider SPF pass for EHLO only when the incoming message is a bounce
Quicksand: improved identification of URI in PDF

Improvements

System notification: use license technical contact for system notification from cloud appliances
Search: added database optimizations when email filters contains explicit domain
SPF engine: add Authentication-Results header instead of Received-SPF header
Database: double write-though cache size for XL appliances
Web UI: update SMTP Check override description
QR code: integrate new rule for esvalabs rules integration
Quarantine report: decreased generation time

Bug fixes

Search: fixed filtering when using not equal conditions on “address” fields
Search: removed many useless parameters from URL to allow more custom filters
Antispam Test: fixed internal headers for scanning
HTTP login DoS protection: login exceptions also applies to token based authentication
DMARC: increase report generation timeout and reduce history days
Email Continuity: fixed DKIM signatures for user generate messages
Integration: always reload license before every import
Outlook add-in: invalidate user session if token expired or became invalid

API

FIXED: avoid 500 errors from POST /message/{id}/mark-for-release when release reason is required

Version 5.2.14 (Nov 13, 2023)

Security

Quicksand: for first time senders disarm all URIs, including PDF text body

Improvements

Right to be forgotten: remove users with matching primary addresses and user secondary addresses (also correct license counting)
Clamd: improved reliability of signature download in case of remote server errors
DKIM: added record type description in Web UI
Web UI: added search by comment in many pages
Admin console: improved purge queue command output and performance

Bug fixes

Licensing: updates users primary address when recomputing license usage
Web portal authentication: when using multiple LDAP sets for the same domain, don’t exit on first error
Outlook add-in: support Outlook instances based on IE/Trident instead of Edge
message rescan: allow to rescan dictionary based messages
ATP: cleared stale runtime cache to re-enable email notification
Rsyslog: fixed selection of TLS Certificate file
Integration: avoid import issues when creating new group email that are assigned to multiple users
Web UI: added ARC title in menu entries
LDAP: special wildcard are escaped when passed in as values
Antispam test: increased accuracy of test results
Antispam engine: increased internal max message body size
ARC: prevent duplicate domain entries
Dangerous attachment rules: fixed web UI for option “Block outgoing messages with not allowed attachments”
DMARC reports: ignore rua for email without domain, that will fallback to local hostname/domain

API

ADD: DELETE /message/{id}/body for remove message body from quarantine
ADD: POST /message/{id}/mark-release action to mark to release a message
ADD: POST /message/{id}/release action to release a message
ADD: POST /message/{id}/forward action to forward (a.k.a. release to) a message
ADD: POST /message/{id}/rescan action to mark to rescan a message
ADD: POST /message/{id}/submit-as-good action to submit a sample to esvalabs as good
ADD: POST /message/{id}/submit-as-bad action to submit a sample to esvalabs as bad
ADD: POST /message/{id}/train-ai-good action to train AI with a sample as good
ADD: POST /message/{id}/train-ai-bad action to train AI with a sample as bad

Version 5.2.13 (Oct 26, 2023)

Security

QRCode: detect and analyze embedded images in HTML code

Improvements

Dynamic Verification: bulk update of server/port

Bug fixes

Mail Encryption: fixed Web Service configuration
Digest Report: only show permitted actions for Functional Users
Google Workspace: skip import of archived users
Definitions update: properly identify default network interface
Backup: don’t restore cluster settings

Version 5.2.12 (Oct 17, 2023)

Improvements

Auditing: improved log of message release notification changed
Release request: include also clean messages

Bug fixes

Web UI: use configured date format in all configurations
DMARC: increase timeout of report generation
Auditing: fixed audit of Restricted Senders
License billing: fixed visualization of first and last seen columns
License count: restore counting when previous accounted email was invalid
MCP Action: fixed save of high MCP message actions
Google Workspace integration: handle errors caused by API returning empty pages
Auto User Creation: do not add invalid users
Encrypted Reply: properly allow from address when original recipient(s) are mixed case
Domain Admin Permission: removed full list of relays from HTML source

API

FIX: properly check existing welcome/block lists in POST action

Version 5.2.11 (Oct 3, 2023)

Security

Quicksand: improved detection of active code in PDF
Quicksand: block Office document that use and external template
Quicksand: improved detection of active content in RTF document
Published security policies (RFC 9116)
TxRep: improve outgoing learning capabilities from Microsoft 365 tenants
Login: use stricter content security policy

Features

Inline deploy for Microsoft 365

Improvements

DMARC reporting: don’t generate report for managed domains
DKIM: show only non-configured relays when create a new DKIM key pair
Updates: added more Libraesva repository mirrors

Bug fixes

Spam Engine: skip RBL check for appliance hostnames
Login: improved user interface and form validation
Quicksand: properly cache results for indeterminate files
Quicksand: restore tracking of message result Quicksand URI disarm
DMARC: removed memory leak in ARC validation
DMARC: properly restart/reload daemon to apply new configurations
Delivery test: fixed custom TLS certificates option simulation
Licensing: don’t apply subaddressing if new local part is empty
Reports: fixed donut chart values for “top sender by volume” and “top recipients by volume” reports
Dashboard: honor “Messages per page” preference for “LAST * MESSAGES” section
Message Details: show URLs before others in URIs section
Message Details: hide “Search on Virus Total” button for non-URLs URIs
Cluster auto-recover: added auto-recovery for duplicated URIs
Cluster monitor: avoid UI unresponsiveness when the other node is down
Cluster setup: replicate timezone before setup and handle NTPd firewall restrictions
SMTP Restriction: fixed configuration on new appliance
LDAP: fixed update of very old users without an external id
LDAP: improved help message for many fields
Firewall check: use strict SSH host checking as in actual cluster setup
TxRep: added score limits to prevent fast fluctuation in scores

Version 5.2.10 (Sep 11, 2023)

Security

QRCode: handle evasion attempt based on invalid content-types
Login Authorized Network: add new category for Impersonator user (i.e. API user)

Improvements

Cluster setup: preserve setup log for more than 30 days
Login Authorized Network: extends defined user rules to functional users
SMTP Check Override: add advanced logging and auditing

Bug fixes

Search: avoid memory limits when exporting many thousands or records
Logwatch: fixed a regression which caused the report to be sent twice
Web server: reset logs permission to 5.2.x defaults
Log rotation: randomize service start time to avoid disk usage spikes
Custom spam policies: on show list all configured details
SMTP Check Override: stricter validation of network addresses

Version 5.2.9 (Aug 29, 2023)

Security

ClamAV: upgraded to version 0.103.10

Improvements

Auditing: show “via WEB-ANON” when user action are made via safe-learn network
Console: allow remote support to connect on port 443, 505 and 25
Dashboard: show cluster warning when one node is blocked connecting to the replica
Logs rotation: use default system cron to make sure is always
Cluster setup: improved progress visualization on the web UI

Bug fixes

License Accounting: integrate recipient to mailbox when a user with the same primary address is created
Submit to labs: improved email generation with big samples
ExternalUserSync: in case of conflicting user and functional user, keep the former
SASL LDAP: validate required field and add support anonymous bind
Web UI: avoid duplicated info/warning messages
Reports: preserve HTML UTF-8 options when editing email templates
Dashboard: analyzed messages account are limited to email strictly owned/visible by logged in user
Recall: ignore recall action on a quarantined message to prevent spurious errors
Cluster: auto-recover cluster that may have blocked during upgrade from 5.1
Cluster setup: don’t hard fail if cluster is correctly setup but quarantine first initialization is not
Cluster setup: forced alignment of datetime and system timezone before update
Cluster destroy: remove remote host information when destroying cluster
ESG 4 import: ignore certificates with invalid CN (e.g. non-FQDN)
ESG 4 import: upgrade migration for antispam action which may block the upgrade
ISP panel: handle many spurious situation from ESG 4.9 and wrong server configuration

API

ADD: POST /user/{id}/password to change or remove user password
ADD: POST /user/{id}/otp-secret to change or remove user OTP secret
IMPROVEMENTS: add boolean property passwordEnabled to GET /user/{id}

Version 5.2.8 (Aug 8, 2023)

Security

Quicksand: add RAR archive reconstruction on sanitization
Passwordless: enforce OTP on cookie initialization

Improvements

Microsoft 365: automatically detect and sync mailboxes that became shared mailbox
Storage: convert from MBR to GPT only when expanding the disk
Cluster recovery: 10x speed for multiple consecutive identical errors
Reports: use UTF-8 for HTML instead of IS0-8859-1
User Management: allow search by username to domain admins
Outlook add-in: improved rebrending (may need reinstall)
User actions: warning and errors from user actions are also logged to syslog
User manager: use a relay select for assigning domain admin permissions
Web UI: uniform all sender/recipient labels to properly hint about accepted values

Bug fixes

MTA: resolved timeout issue for outgoind SMTP messages to relay port 467
Relay delivery test: updated TLS management, aligned dynamic verification and add header Date to sample message
Integration: don’t log an update notice when there are unchanged email address
Letsencrypt: updated certbot and dependencies
Licensing: fixed domain computation when “Add groups as user email” is disabled
Reports: variable $hostname is aligned with MTA hostname
ESG licensing: added users statistics to facilitate accounting resolutions
Passwordless authentication: added CSRF validation
Cloud IPs: update Microsoft365 and Google Workspace IPs on primary node only
Cloud IPs: on installation, always re-download updated data
Rsyslog: remove duplicated forwarder configuration (left by version 5.1)
Web UI: remove useless tab from MTA advanced settings
Mail Scanner: IP based rules have higher priority than domain based rules in first match rules
File rules: fixed JS validation for sender “bounce” keyword
Job status: faster timed out job cleanup

Version 5.2.7 (Jul 24, 2023)

Security

Mail Scanner: extract and analyze URL encoded as QR images
Avira: upgraded to version 4.15.17.118

Improvements

Mail Scanner: convert broken xbrl.p7m/xml.p7m sent in quoted-printable instead of base64
Passwordless authentication: add confirmation page to prevent Microsoft SafeLink invalidation of authentication
Microsoft 365: add weekly system notification when client secret is expired on the external connector
Boot sequence: faster boot sequence when optional system updates are available
External warning exception: added advanced auditing
Short URL decoding: use faster cache in tmpfs
Blocklist/Welcomelist: add apply button on domain admins web UI, to immediately apply settings

Bug fixes

ClamAV: remove old databases from ESG 5.1 which may slow down the daemon
Licensing: fixed a bug in avira/bitdefender accounting which may suspend incremental account
Relay test: use custom TLS certificate if overridden in relay configuration
User Manager: allow domain admin to edit quarantine options of functional users
System settings: reload ATP and DMARC service after changing system administrator email
Outlook Add-in: distinguish 4xx/5xx errors from generic issues
Dictionary: fixed the name label in web view
LetsEncrypt: fixed renew of MTA only certificates when strict canonical names are enabled
Trusted network: fixed update of existing records
ISP Monitor: improved feedback on failure
Welcomelist/Blocklist: ignore username when listing rules (unless is listed as a real email)
Integration: when an import job fails or partially fails, the UI job status is shown as failure
Integration: since Exchange don’t support searching with empty DN, add a hint in the web UI
Relay: fixed validation of single-letter sub domains (e.g. a.domain.test)
Forgot password: allow recovery to domain admin with no primary email, but with quarantine email in his domain
Logwatch: fixed configuration of sender and recipient after system email change
ESG 5.1 upgrade: improved migration of antispam actions, and add more logging for configuration recovery
Account Takeover Protection: fixed enable/disable of Policy Quota service

Version 5.2.6 (Jul 10, 2023)

Improvements

Outlook Add-in: removed Libraesva ESG references to improve rebranding
Antispam engine: improve compile speed by using RAM disk instead of primary disk
Message details: identify user defined rules in custom reports even when the rule is removed
Antispam engine: use idle CPU cycles when optimizing spam rules

Bug fixes

Attachment filters: removed a bug which prevented multiple default rules to apply simultaneously
Integration: fully recover login with primary address on LDAP sets
POP3: honor configured port when different from defaults
Integration: added more validation checks on import and during auto-creation on login
Login network: allow removal of network even when the next authentication may be a lockout
Outlook Add-in: show server errors in the UI to ease EWS debugging
Outlook Add-in: when both actions “release” and “ask to release” actions are available, only show the former
Integration: avoid transactions lock when synchronizing huge LDAP/Microsoft 365/Google Workspace sets
Licensing: redirect to billing page after recalculate action
ESG 5.2 upgrade: always add username as email address and improve primary email selection
ESG 5.2 upgrade: improved removal of duplicated welcomelist/blocklist

Version 5.2.5 (Jun 28, 2023)

Security

Attachment filters: block .url file extension by default
Message Recall: allow recall when message body is missing, but message headers are available

Improvements

Licensing: added “Right to be forgotten” action which removes messages and deliveries for an email address;
Licensing: improved licensing detail view by adding page “Overview” and “Billing”
Licensing: add detailed delivery records in page “Usage Detail” for mailbox licensing model and MSP custom business logic
Licensing: show excluded address detailed page
Graph: added graph “Licensing Domain Based Recipients Usage”
Graph: renamed graph “Per Domain Mailbox Usage” as “Licensing Domain Based Recipients Usage”
Integration: add option “Force quarantine disabled on creation”, mainly used during upgrade
Integration: improved import speed using multiple database transactions
MTA: shows sender IP 127.0.0.1 for locally generated bounces

Bug fixes

Attachment filters: prevent adding spaces in regex that are not supported by the mail scanner
Avira/Bitdefender: make sure daemon is restarted when options are changed
Clamd: restart updater daemon in case was stuck during mirror updates
ExternalSync: make sure uniqueness of username and primary address is verified on first bulk import
Gsuite OAuth: case-insensitive username check on login
HTTPd cache: fixed a memory exhaust issue with some queries
Integration: IPs for Microsoft 365 and Google Workspace are updated only on primary node, and then replicated
LDAP Integration: simplify the query filters to workaround Domino limits
LDAP Integration: allow to filter “other email addresses” by a single address
LDAP Integration: improved user updates from previous version
MTA queue: fixed UI issues when IP reverse is not available
Maillog: fixed “rjct” prefixing of rejected messages
Message Actions: during “mark for release” username are not used as email
SNMPd: added validation for IP field
TLS certificates: improved error messages during wildcard validation
User Import: initialize defaults after define the primary address
Web Portal: fixed set removal when bound to multiple domains
Reports: replaced leftover blacklist terms with blocklist
ESG 5.2: fixed LDAP configuration migration when user filter is empty
ESG 5.2 upgrade: on error shows more error logs

API

ADD: licensing billing data via GET /graph/licensing-billing.
ADD: licensing recipient usage data via GET /graph/licensing-recipient-records.
IMPROVED: handling of `@` sign in spurious location in all API calls.
DEPRECATED: /graph/per-domain-mailbox-usage.

Version 5.2.4 (May 30, 2023)

Security

MailScanner: block 7z archives with encrypted file names
Quarantine actions: verify also user permissions (e.g. release) in addition to permissions check for functional users actions

Improvements

Whaling: allow capitalized envelope-from addresses
WebBug: use less invasive title instead of alt
Wizard: permit to skip first relay configuration
Spam Rule Hit report: improved generation speed
Message Headers: automatic replace of broken UTF-8 sequences
Submit as Bad: release permission is no longer required
Azure appliance: added trust for Microsoft management IPs

Bug fixes

Outlook-Addin: fixed Submit as Bad sample for messages analyzed by multiple ESG instances
Digest report: restored action link for Functional Users
Digest report: restored password-less action link for administrators without a primary address
Message: fixed logging of message and delivery information for mail with both valid/rejected recipients
Attachment Filters: do not permit to create rules with an IP Address/CIDR as recipient
Welcomelist/Blocklist: preserve case sensitivity of comments
HTML Disarm: fixed iframe disarm configuration
License accounting: properly identify recipient or mailboxes after changes on users
Message Details: fixed “Add to Welcomelist/Blocklist” button action
FTP Schedule: edit popup now show the configured port instead of default port 21
LDAP: fixed configuration of “Add Group Email to Users” option
LDAP: fixed pagination identification from server capability
Web Portal Authentication: properly fallback to Local User stored password, when external authentication method failed
IMAP Login: use configured port instead of default 143/993
Digest Report: automatic redirect for URL generated in previous version
Bayesian Learn: fixed automatic learn as good on release action for anonymous users (Safe-Learn network)
Search: restore total record count, without losing optimizations
DKIM/DMARC: fixed redirect after save
ARC: added validation for duplicated entries
System upgrades: make sure services are not left stopped after database updates
ESG 4.9 migration: added migration of SMTP-Auth LDAP configuration

API

SECURITY: check privacy password in /message/{id}/fetch and /message/{id}/fetch/{attachment}
IMPROVEMENT: remove from message-soar and message-journal documentation for unsupported pagination options

Version 5.2.3 (May 17, 2023)

Security

Whaling: improved whale identification
Welcomelist/Blocklist: added support for “bounce” sender keyword

Improvements

LDAP Integration: improved Zimbra primary address identification and updated reference configuration

Bug fixes

Database Rotation: delete orphan deliveries and requeue based on MTA queue lifetime
Threat remediation: fixed mailbox search for Exchange on-premise
Web UI: fixed 500 errors due to memory exhausted
Logger: avoid memory issues due to cache slams logging
Integration: ignore case sensitivity when searching existing user email
Seach page: fixed queries for page and recipient counting
ESG 5.2 migration: delete invalid rules which may block the mail scanner
Logwatch: updated configuration for ESG 5.2 release
Bitdefender: forcibly restart service if stopped due to previous bugs

Version 5.2.2 (May 8, 2023)

Security

Savapi: update to version 4.15.16
Bitdefender: update to version 3.2.2

Improvements

Microsoft 365: support user import from Hybrid configurations
Microsoft 365: don’t import users with #EXT# in username
Search: automatically resize results per page to improve server reliability
System Preferences: added a separate option for message max results
Learn Actions: always update Adaptive Trust Engine when learning as good or bad
File name rules: added regex filter on search
Whaling: add apply button to force immediate engine configuration reload
Release request: ignore notification to domain admin without addresses
Web UI: improved message listing in when in mobile view
Storage: automatically convert MBR to GPT for some cloud providers

Bug fixes

Web UI: fixed validation of custom antispam scores
SubmitToLabs: when submitting as bad, use learn-as-bad instead of forget
Quarantine reports: allow actions from quarantine report for read-only admins with “mark for relase” permissions
Custom rule: fixed validation when using header exists rule
MailScanner: always clean anti-spam cache on apply settings
HTTPd: fixed listing of server aliases
Cluster setup: after setup enable file sync on replica node
MTA: starts after the network is online to prevent error on reboot
Web UI: added redirect for old advanced settings address
User manager: show help button in standard toolbar
User manager: when setting the user primary address, make sure all others are set as secondary
Logwatch: updated configuration for ESG 5.2 release
ESG 5.2 upgrade: pre-install the upgrade file for user convenience

Changes in v5.2.1 (Apr 26, 2023)

Improvements

Added header X-%org-name%-FirstTimeSender: 1 to messages identified as first time senders
Cluster auto-recovery: improved recovery speed and replica stability
Anti-spam test: more accurate test with new report format
Integration: promote or demote between normal user or functional user, but leave admin account unchanged

Bug fixes

Routing issue (404): moved all admin area under /admin/ to resolve all 404 issues
Message deliveries: fixed a database issue which slowed down delivery updates
Message details: Fixed flash message after message rescan
User Manager: fixed Permission field on user edit
FTP backup: port field accept port above 32000
HTTPd: fixed strict host checking for HTTP validation (port 80)
Release requests: fixed notification to domain admin
Release requests: fixed error visualization when quarantine file is not available
Login Network UI: fixed javascript network validation
Maillog2db: avoid crash when logs contains spurious binary data over date values
Mail scanner reconfiguration: avoid crashes when there are multiple default/default rules
Threat remediation: show proper error when test user is not configured
License UI: show proper issued date
Domain privacy password: resolved UI errors for domain admin without associated domains
ESG 4.9 migration: fixed anti-spam actions migrations when delete action is set

Changes in v5.2.0 (Apr 3, 2023)

Security

ARC policy evaluation: explicit trust validation of ARC chain has been added for forwarded emails.
Relay RBL: RBL check can now be enabled or disabled on a per-domain relay basis.
DANE verification: DNS-SEC options have been integrated to support DANE as a global configuration.
Firewall requirements: Outgoing port TCP 873 (RSYNC) is no longer required and can be closed on the firewall.
Firewall requirements: Outgoing port TCP 80 (HTTP) is no longer a requirement, but it provides extra protection
against HTTP-based URL shorteners..
HTTPd: add strict host checking when SSL is correctly configured.
HTTPS TLS: Only TLS1.2 and TLS1.3 with high-grade ciphers are now allowed.
System TLS: CBC, CAMELLIA, and SHA1 have been removed from all TLS connections except HTTPS and SMTPS.
ClamAV: SaneSecurity signatures are now managed from the official Libraesva repository.
Permissions: users can only “submit as good/bad”, while administrator can also “mark as good/bad”
or “train as good/bad”.

Improvements

Quicksand: added a domain-based cache to speed up sanitization and avoid DoS.
PhishBrain: automatic campaign integration when users triggers “submit as bad” on a phishing test
campaign.
Adaptive Trust Engine: rotate idle historical record (more than 18 months).
Attachment filter: file name and file extension rules can be managed from a single list.
Attachment filter: added option to block outgoing messages on attachment removed.
Auditing: added advanced auditing to all entities available via API.
Avira: improved Web UI interface.
Cluster setup: improve compression and transfer speed for multi-CPU appliances.
DKIM: keys can be created only for existing relay domains.
DKIM: automatically generate keypair on record creation.
Gray Listing: no longer applies to trusted senders and well-known cloud providers to avoid a long delay on first
contact.
Integration: add an option to force enable/disable quarantine digest option, independently from domain defaults.
Licensing: computation triggered from the web UI is now completely asynchronous and with real-time job status
tracking.
Machine Learning: add statistics and cleanup buttons in TxRep pages.
Machine Learning: improve statistics and cleanup buttons in Bayes pages.
Mail Queues: show sender IP in message listing and reverse hostname in details.
Message details: show additional information when the spam report is affected by user-made configurations.
Message details: show from the Web UI the welcomelist or blocklist triggered by the message.
Message listing: show message directions as seen by the logged-in user.
Message release: mark a released message as “Release” instead of generic “Off”.
Message: use a new message ID format which is guaranteed to be unique across multiple instances.
Email Continuity: compose and reply actions prefill user email addresses.
MTA advanced: resource profiles ranges are now renamed from “tiny” to “extra-large” and verified
on the UI before change.
Network config: shows hardware address beside interface name.
Notification to Senders: virus notification is now enabled only for outgoing messages.
Policy Quota: changed server sizing limits to reduce memory usage.
Quarantine reports: digest reports sent by both nodes of the cluster.
Quarantine rotation: improve rotation speed and add logging for inspection.
Remote syslog: send all database change auditing events.
Safe-learn: moved page under web portal, added more documentation and implemented advanced auditing.
Sender/Recipient address rewrite: emails sent from “user” (without domain) that are locally-generated will
be rewritten as user@hostname, while emails sent by a trusted source will be rewritten as user@domain.
Smarthost: configuration is no longer replicated in cluster setup to allow advanced routing policies.
Smarthost: moved configuration under relay configurations.
Spam Actions: bounce action is valid only for messages received from trusted senders.
Storage management: automatically expand storage at boot when enough free space is found.
UX: ease navigation by using more compact sidebar menu entries and option list entries.
User Action: improved the web UI theme and messages.
User manager: added configuration for new user default settings and permissions.
User manager: hide external ID from user listing.
User manager: added all external user information on view.
WebPortal Authentication Test: also show logged messages from M365/GSuite/LDAP/IMAP/POP3 authentication sets.
Database optimization: reduce memory used by the database (for all appliance sizes), while improving connection
speed and cache hit.
Webserver optimization: use a second shared memory cache to speedup page loading.
Storage: use trimming on SSD storage to free unused blocks.
System Kernel: upgrade system kernel from version 5.4 to version 5.15.
Mail Transport: use file-based database instead of the main database to improve efficiency and reliability.
ESG 4.x Migration: import most recent record first to give immediate feedback on the web UI.

Bug fixes

Sender/Recipient Address Rewrite: message header rewriting is active for emails sent by trusted senders.
User validation: added stricter permission checks when editing users.
Remote syslog: fixed service restart on remote server configuration change.
IMAP: now supports passwords with special characters when the remote server supports the AUTHENTICATE method.
SNMP: optimized the Libraesva OID, especially for “queue length” when in critical length status.
Web UI: renamed all references to “G Suite” with “Google Workspace”.
Web UI: renamed all references to “Office 365” to “Microsoft 365”.
Web portal authentication: deleted orphaned set associations.
Message Details: removed the spam report button when there are no specific rules.
Renamed “Archive Check Rules” to “Archive Scan Rules”.
Completely disabled the GPG agent when mail encryption is disabled.
Completely disabled the DCC service when the antispam feature is disabled.
ESG 4.x Migration: import customized MTA DoS limits.

API

ADD: allow read only access to licensing accounted emails via /licensing/accounted-email.
ADD: allow user creation (POST /user), editing (PUT /user/{id}) and delete (DELETE /user/{id}).
ADD: manage user defaults via /user-defaults.
ADD: manage filename rules via /attachment-filter/file-name-rule.
ADD: manage filetype rules via /attachment-filter/file-type-rule.
ADD: manage scan archive rules via /attachment-filter/scan-archive-rule.
ADD: manage password-protected archive rules via /attachment-filter/password-protected-archive-rule.
ADD: manage restricted senders via /restricted-sender.
ADD: manage welcomelist via /welcomelist.
ADD: manage blocklist via /blocklist.
IMPROVED: rename user property quarantine_permissions/user_permissions to permissions.
DEPRECATED: all request URI matching /whitelist are deprecated, use /welcomelist.
DEPRECATED: all request URI matching /blacklist are deprecated, use /blocklist.

Breaking changes

This version introduces some changes which require your attention.

User configuration is based on primary address, whereas in the previous version, it was based on either
the quarantine recipient address or the first email address. This may change the “active configuration”
(e.g., quarantine report configuration) for some users, especially those imported from LDAP. This
change won’t affect users imported from Microsoft 365 and Google Workspace.
Usernames must be unique and are no longer considered owned email addresses. All previous
data is migrated to preserve the current permissions, but the LDAP sets may need proper cleanup
or reconfiguration to be able to allow import.
Removed HTTPS compatibility with old browsers. Stricter TLS checks: HTTPS no longer compatible
with Android <4.4.2, Firefox < 27, Chrome < 31, IE before Windows 7, Safari < 9.
Normal users are only allowed to “submit as good/bad,” not to “mark as good/bad,”
so you may need to change some customized reports to reflect this change.
System-generated emails are now sent using the format $local_user@$esg_hostname,
so make sure your mail server properly handles such cases.
Remote syslog message ID changed. Message IDs in versions up to 5.1 will use the format
matching the regular expression /[A-Z0-9]+\.[A-Z0-9]{5}/, while versions 5.2 onward will use the new format
matching the regular expression /[0-9B-DF-HJ-NP-TV-Zb-df-hj-np-tv-z]{12,}/.
Antispoofing extended to subdomains. Improved protections against spoofing by extending
the Trusted Networks check to subdomains. If untrusted sources send messages to ESG
from a subdomain use “Standard (SPF)” instead of “Trusted Only” in the Antispoofing configuration.

Version 5.1

All upgrades from previous versions are included. See the full release notes of Libraesva ESG version 5.1.