Installation manual

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3. ESET Mail Security - Microsoft Exchange Server protection
ESET Mail Security provides significant protection for your Microsoft Exchange Server. There are three essential
types of protection: Antivirus, Antispam and the application of user-defined rules. ESET Mail Security protects from
various types of malware content, including email attachments infected by worms or trojans, documents
containing harmful scripts, phishing and spam. ESET Mail Security filters out the malicious content on the mail
server level, before it arrives in the recipient's email client inbox. Following chapters describe all the options and
settings available to you in order to fine-tune your Microsoft Exchange Server protection.
3.1 General settings
This section describes how to administer rules, log files, message quarantine and performance parameters.
3.1.1 Microsoft Exchange Server
3.1.1.1 VSAPI (Virus-Scanning Application Programming Interface)
Microsoft Exchange Server provides a mechanism to make sure that every message component is scanned against
the current virus signature database. If a message component is not scanned, its corresponding component is
submitted to the scanner before the message is released to the client. Every supported version of Microsoft
Exchange Server (5.5/2000/2003/2007/2010) offers a different version of VSAPI.
Use the checkbox to enable/disable the automatic startup of the VSAPI version used by your Exchange server.
3.1.1.2 Transport Agent
In this section, you can configure the transport agent to automatically start and set the agent loading priority. On
Microsoft Exchange Server 2007 and later, it is only possible to install a transport agent if the server is in one of two
roles: Edge Transport or Hub Transport.
NOTE: The Transport agent is not available in Microsoft Exchange Server 5.5 (VSAPI 1.0).
In the Agent priority setup menu, you can set the priority of ESET Mail Security agents. The agent priority number
range depends on the version of Microsoft Exchange Server (the lower the number, the higher the priority).
Write spam confidence level (SCL) to the header of scanned messages based on spam score – SCL is a