Installation manual

3
1. Introduction
Dear user, you have acquired ESET Mail Security - the premier security system running under the Linux, BSD and Solaris OS. As
you will soon find out, 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 Linux, BSD and Solaris OS server.
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. In addition 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
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 the need for any external programs.
Speed and efficiency
To increase the speed and efficiency of the system, its 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 non-privileged user account to enhance security.
Selective configuration
The system supports selective configuration based on the user or client/server.
Multiple logging levels
Multiple logging levels can be configured to get information about system activity and infiltrations.