User Guide

CHAPTER 8. FREQUENTLY
ASKED QUESTIONS
This chapter contains a detailed discussion of questions most frequently asked
by our users regarding the installation, configuration and operation of the
application.
Question
: Is it possible to use Kaspersky SMTP-Gateway with anti-virus
products of other vendors?
No. We recommend uninstalling anti-virus products of other vendors
prior to installation of Kaspersky SMTP-Gateway to avoid software
conflicts.
Question
: Kaspersky Anti-Virus does not rescan files that have been
scanned earlier. Why?
This is true. The application does not rescan files that have not changed
since the last scan.
That has become possible due to new iChecker™. The technology is
implemented in the program using a database of file checksums.
Question: Why does Kaspersky Anti-Virus cause a certain decrease in
server performance, noticeably loading the CPU?
Virus detection is a computationally intensive mathematical problem
requiring structural analysis, checksum calculation and mathematical
data conversions. Processor time is therefore the main resource
consumed by the program, and each new virus added to the anti-virus
database increases the overall scanning time. This is a necessary
sacrifice for the security and safety of your data.
Other anti-virus products speed up scanning by excluding both viruses,
which are less easily detectable or less frequent in the geographic
location of the anti-virus vendor, and file formats that require
complicated analysis (e.g. PDF) from their databases.
In contrast, Kaspersky Lab believes that the purpose of its products is to
establish real and complete security for its users.
Kaspersky SMTP-Gateway gives its users maximum protection.
Experienced users can accelerate anti-virus scanning to the detriment