Email Security

Libraesva Email Security Gateway: Expert Insights Review

Expert Insights’ technical review of Libraesva Email Security Gateway.

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Expert Insights Score: 4.5/5 

What We Like: 

  • Libraesva ESG is highly flexible, both in terms of configuration to suit a variety of environments, and in terms of customizing its powerful feature set—ideal for technical enterprise support teams.  

What To Be Aware Of: 

  • The interface is complex to navigate, and much of the product’s support documentation is out of date.

What Are Libraesva Email Security Gateway’s Key Features? 

Libraesva Email Security Gateway supports both inbound and outbound protection, with configurable data loss prevention policies, a phishing domain blacklist and a Whaling Protection List toprevent more sophisticated social engineering attacks as well as spam and graymail. The remediation feature also removes phishing emails from user inboxes if identified. post-delivery. 

The platform also offers in-built antivirus scanning and URL and attachment scanning.  

End users are informed of blocked emails via a quarantine digest and can release emails themselves or request that an admin release them, depending on their access permissions.  

Admins can easily search logs with support for saved searches and wildcarding, as well as instantly generate reports based on a wide variety of metrics, including top senders/sending domains, hits on spam rules, and Mail Transport Agent (MTA) statistics.  

Finally, Libraesva ESG offers an Outlook plugin, support for two-factor authentication, and mobile app support for iOS and Android devices.  

How Effective Is Libraesva Email Security Gateway? 

Libraesva ESG comes with some data loss prevention policies set up by default and admins can build further DLP rules through regular expressions. ESG’s blacklist of phishing sites and domains is updated hourly, and its Whaling Protection List enables admins to add further impersonation checks to emails sent to or from high-value users. 

The search and reporting capabilities are strong and relatively easy to navigate via the platform’s web-based console, and reports can be exported to PDF and shared via email.  

The platform includes ClamAV antivirus scanning by default, and Avira and BitDefender are available as optional add-ons for additional virus scanning.

The ESG itself doesn’t contain a direct link to support documentation; the Support hyperlink at the bottom of each page directs users to their own domain. The documentation hosted on Libraesva’s website contains a knowledge base, how-to guides, and downloads to upgrades and utilities—but only for version 4.0, with no information on the new features offered in version 5.0.  

How Easy Is Libraesva Email Security Gateway To Manage? 

Libraesva ESG takes around one hour to deploy whilst on a call with a Libraesva engineer. The same goes for deploying many domains at once.  

The solution offers lots of granular configurability. This can be difficult to navigate but, once configured, the solution requires little maintenance. For Microsoft Office 365 users, Outbound mail is routed through Office 365 before being sent, meaning that DKIM and domain reputation aren’t affected.  

From the web-based console, admins can customize most aspects of the ESG, including status, appliance, mail transport, content analysis, authentication and integrations. Integrations are straightforward to set up, with LDAP support and support for both IMAP and POP3 for authentication. However, some customization options are difficult to find due to the number of options available.  

The user access control policies and end user self-service options allow users to control their own message logs, white and blacklists, and quarantine digest report delivery. 

Who Is Libraesva Email Security Gateway Best Suited For? 

Libraesva Email Security Gateway is a sophisticated product for an admin with lots of technical knowledge. Though the platform can be difficult to navigate, the levels of customization and analysis that it provides are impressive.  

Organizations can deploy many domains at once, and Libraesva offers support for hosting your tenant in their cloud or your own cloud, as well as support for clustered and multi-tenant environments, and for email hosting companies such as Office 365 and Google Workspace.  

This flexibility, along with the platform’s deep level of configurability, makes Libraesva ESG a strong, cost-effective email security solution for large organizations with technically knowledgeable security staff that they can dedicate to the solution’s management.  

Our Verdict 

Libraesva Email Security Gateway is a strong solution for medium and large enterprises or educational clients looking for cost-effective protection against email threats, with high levels of customization.  

The platform offers a wide range of powerful features, highly granular search functionality and effective end user permissioning that enables admins to control how much influence end users have over their own email. 

The ESG’s main drawbacks are its lack of documentation for the latest version, and its difficulty to navigate—but for a large organization with plenty of technical resource, this shouldn’t detract from the powerful protection Libraesva ESG offers.  


Written by Caitlin Jones 

Tested by Laura Iannini 

Date of Testing: 23 February, 2022 

Date of Publication: 04 March, 2022