ESET MAIL SECURITY User Manual

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Protocol or IMAP - Internet Message Access Protocol to communicate with the MTA. To send data
to the Internet the SMTP protocol communication is used.
The ESETS operating principle is based on data communication interception and scanning
at the various phases of its transfer. The interception locations are marked in the gure 4-1 by
symbols S1, S2, S3 and S4.
S1
Bi-directional e-mail messages scanning, i.e. content ltering in MTA.
S2
Scanning of inbound e-mail messages, i.e. messages with the target address corresponding
to the destination located inside the local domain.
S3
Scanning of outbound e-mail messages, i.e. messages bound to some remote Internet
domain via its target address.
S4
Scanning of e-mail messages being downloaded from POP3/IMAP server.
The rest of this chapter reviews methods of integration of ESETS with variety of supported
messaging systems.
5.1. Bi-directional e-mail messages scanning in MTA
The advantage of bi-directional e-mail messages scanning mode is that it allows one to scan
e-mails inbound as well as outbound in the same implementation algorithm. On the other hand
the bi-directional (content lter) method is MTA dependent. The ESET comes with four content
lters built for most common MTA, i.e. MTA Sendmail, Postx, Exim, QMail and ZMailer.
In order to congure ESET Mail Security for bi-directional e-mail messages scanning you have
to be sure that your MTA is properly congured and running. Then run this script:
esets_setup
Select MTA and contentlter install options. Used ESETS module is also displayed.
Note that the installer backups all modied conguration les and can display all commands
it will execute after your approval. Use it for uninstall, too. The detailed steps for all possible
scenarios are described in the appendix A of this documentation.
5.2. Scanning of inbound e-mail messages
Scanning of the inbound e-mail messages is performed during the messages transfer
between MTA and MDA. The incoming e-mail is intercepted by esets_mda module, scanned by
ESETS daemon and delivered to MAILBOX using original MDA. As shown in the gure, the virus
chapter 5 Integration with E-mail messaging system

ESET MAIL SECURITY Specifications

General

Category	Email Security Software
Developer	ESET
Supported Platforms	Windows Server, Linux
Key Features	Anti-Phishing, Anti-Spam
Integration	Microsoft Exchange Server
Management	ESET Remote Administrator
Threat Detection	cloud-based
Reporting	Customizable reports