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Kerio Connect 9.4.1 Build 6445 Patch 1 by GFI

Kerio Connect (formerly Kerio MailServer) represents a new generation of 
mail servers designed for corporate networks. The award-winning, low-overhead alternative to Microsoft Exchange, this Kerio software meets the needs of small and mid-sized businesses.

It offers unmatched deployment flexibility and broad mobile device support. Business users enjoy support for their favourite email client and Kerio Connect Client via their favourite web browser. Then users can see the presence of colleagues, chat in real-time, and organize meetings.

Furthermore, you can securely compose richly formatted emails. Kerio Connect also provides full support for Outlook (Windows and Mac) and many other IMAP or POP compliant email clients.

Kerio Connect is stable. So you can focus on your business rather than unexpected downtime and recovery. Deployment and administration are simple by design. With low licensing, service and hardware costs, the program delivers measurable business value over other offerings.

BYOD Made Easy

Kerio Connect makes BYOD easy. Supports virtually every mobile device on the market. From iPhones to Android phones to tablets. And this software is so simple to use that end users can configure their own devices without bothering IT.

Secure and Protected Email

You’re protected against hacking and malicious attacks with SSL encryption, S/MIME, anti-spam and anti-virus tools, and more. Automated backup with granular restore options ensures quick and easy recovery from all types of disasters. Server-wide archiving prevents data loss and helps organizations to comply with legal requirements for email retention.

Flexible Deployment

Kerio Connect supports three different deployment options. That lets you choose the approach that best fits with your existing IT processes, infrastructure and organization. No matter what option you use, Kerio Connect offers the same great end-user experience, rigorous security, and ease of administration.


Easily install Kerio Connect on your existing hardware, using your favourite host OS or hypervisor. Most versions of Windows Server, Linux and even Mac OS are supported. Or choose the VMware virtual appliance to easily run Kerio Connect side-by-side on the same hardware as your other business applications without worrying about operating system compatibility.


Deploy this modular, multiple server solution for greater scalability and performance in larger organizations and distributed multi-office environments, or in partner-hosted Kerio Cloud environments.

Kerio Cloud.

Use email, calendars, and Instant Messaging and benefit from simultaneous updates across your iOS, Android or Windows mobile device.

Over 14 anti-spam layers:

  • DHA (Directory Harvest Attack protection)
  • SpamAssassin (Bayes, Heuristic, and SURBL)
  • Anti-phishing / anti-spoofing
  • RBL (Real-time blacklist servers)
  • Custom whitelists and blacklists
  • SMTP restrictions and more…
Changes in Kerio Connect 9.4.1 (March 11, 2020):

New Features:

  • Security Vulnerability – Upgrade to Log4j 2.17.1


  • 3CX meeting invitations are causing Kerio Connect to crash
  • Unable to delete emails from public folders with version 9.4
  • Shared folders with non-ASCII characters sync over ActiveSync regardless of preference
  • Cannot search contact by phone numbers in webmail
  • ActiveSync – Timezones are updated incorrectly when events are updated
  • The filename has escaped characters when using Download All attachments in Kerio Connect Client
  • Added support for Content-Security-Policy-Report-Only HTTP Header

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