Installation manual

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1. Introduction
Thank you for using ESET Mail Security - the premier security system for Linux, BSD and Solaris. ESET's state-of-the-art scanning
engine has unsurpassed scanning speed and detection rates combined with a very small footprint that makes it the ideal choice
for any server on Linux, BSD and Solaris.
1.1 Main functionality
Post Office Protocol filter (POP3)
The POP3 filter scans communication between POP3 clients and servers for viruses.
Simple Mail Transfer Protocol filter (SMTP)
The SMTP filter scans communication between SMTP clients and servers for viruses. Additionally, it can also serve as a content
filter for the Postfix MTA.
Internet Message Access Protocol filter (IMAP)
The IMAP filter scans communication between IMAP clients and servers for viruses.
Sendmail content filter
The Sendmail content filter accesses mail messages processed by MTA Sendmail and scans them for viruses. It examines and
modifies content and meta-information of messages. If an infection cannot be removed from an email message, the message will
be rejected.
External filter plugin for Communigate Pro
The CGP module is an external filter plugin for CommuniGate Pro. It reads email filenames from stdin, then requests a scan by
ESETS daemon and finally returns a status. It examines (but does not modify) email content and blocks messages with
infiltrations in the email body.
PIPE module
The PIPE is a simple email scanner, that reads email from the standard (stdin) input, then requests an ESETS daemon scan. In
case content is accepted, it is submitted to the standard (stdout) output.
1.2 Key features of the system
Advanced engine algorithms
The ESET antivirus scanning engine algorithms provide the highest detection rate and the fastest scanning times.
Multi-processing
ESET Mail Security is developed to run on single- as well as multi-processor units.
Advanced Heuristics
ESET Mail Security includes unique advanced heuristics for Win32 worms, backdoor infections and other forms of malware.
Built-In features
Built-in archivers unpack archived objects without requiring any external programs.
Speed and efficiency
To increase the speed and efficiency of the system, ESET Mail Security's architecture is based on the running daemon (resident
program) where all scanning requests are sent.
Enhanced security
All executive daemons (except esets_dac) run under a non-privileged user account to enhance security.
Selective configuration
The system supports selective configuration based on the user or client/server.