ESET Mail Security 4 for Microsoft Exchange Server keeps your network safe from spam and email infections. At the core of ESET protection is the NOD32 Antivirus 4 scanning engine — fast, accurate and light on system resources — so you don't have to trade system performance for security. Armed with ESET's latest self-defense features, ESET Mail Security 4 safeguards your business from malware seeking to disarm or delete your protection in order to compromise your data.

Mail Security 4 stops email-based malware and spam at the transport layer. Preset profiles make it easy to select the optimal setting between spam detection and performance features. Greylist technology and other spam filters stop unwanted messages from reaching end-user mailboxes. The graphical user interface simplifies setup for advanced features like individual mail recipient quarantines and ThreatSense scanner thread pool tuning.

Compatible with Microsoft Exchange Server (versions 5.5, 2000, 2003, 2007 and 2010).

ESET Mail Security 4
for Microsoft Exchange Server 32-bit RC (48 MB) 64-bit RC (51 MB) Product ManualsDownload the User Guide

Latest News

February 16, 2010 
ESET Mail Security for Microsoft Exchange Server Release Candidate is now available for testing. This release corrects a bug that occurs during uninstallation as well as many other changes and fixes, bringing the product one step closer to general availability. For a complete list, please see the Changelog tab, above.

December 11, 2009
A new build of ESET Mail Security for Microsoft Exchange Server is now available. This release adds support for the released version of Microsoft Exchange 2010 as well as many other changes and fixes. For a complete list, please see the Changelog tab, above.


November 4, 2009
The first public beta for ESET Mail Security for Microsoft Exchange Server is now available.  ESET Mail Security for Microsoft Exchange Server (EMSX) is a new product built on ThreatSense, the industry's most accurate proactive technology for detecting viruses and other malware, delivering proactive protection against zero-day threats and attacks. It features anti-spam protection, transport layer protection and support for additional server roles as well as a number of technological improvements, including:

  • Improved antivirus and antispyware protection, based on the ESET NOD32 Antivirus v4 engine
  • Anti-Stealth - technology to protect against rootkits
  • Greylisting function and other techniques to verify the legitimacy of incoming messages and block unwanted ones at the mail server
  • Both preset and customizable anti-spam profiles to provide the desired balance between detection and performance
  • Self-Defense - protection against malware which may target ESET Mail Security
  • Transport layer scanning - improved scanning of the email database
  • Performance monitoring and statistics with graphical visualization
  • Mailbox-specific rules - flexible rule-based quarantine of potentially infected messages and spam by recipients' addresses
  • Improved graphical user interface, compatible with screen-reading software and High Contrast mode
  • Time-saving system tools:  ESET SysInspector and ESET SysRescue simplify system diagnosis and cleaning of heavily-compromised systems

This beta test version is a precursor of the final product without full functionality and documentation.  It is intended for experienced Exchange Server administrators and should not be installed on mail servers that perform critical tasks because it may cause errors or crashes.

For additional information about what has changed in this release, see the Changelog tab, above.

Looking to beta test other ESET software? Try one of these available beta programs: