User Guide

Application deployment scenarios 17
symbols "*" and "?" can be used). Mail messages for the specified do-
mains will be scanned and licensed.
2.3.2. Installing the application inside your
mail system
If you install the application inside your mail system, the advantage is that the
information and settings for the anti-virus software installed on the server are not
available on the Internet. Besides, if the application is installed inside the mail
system on the dedicated server, this provides for the possibility to distribute the
load among several servers performing anti-virus scan.
The following algorithm is provided for joint operation of the application and the
mail system installed on the same server:
1. Duplicate your mail system and configure one of them to listen to port
25 and receive email messages via all available interfaces.
2. This mail system forwards all incoming messages through the local
interface via a different port (port 1025, for instance) to the application
for scanning.
3. The application scans the email messages for viruses and forwards
scanned and processed messages to the second mail system on a
different port (for example, port 1026).
4. The second mail system delivers email to the local users.
In general, installation on a dedicated server is similar to the above procedure.
Besides, when installing the application on a dedicated server, you can create
and run several copies of the application on different servers. This can help you
distribute the anti-virus processing load among several servers.
To implement this scenario:
Specify the list of all local domains of the company by modifying the value
of parameter ProtectedDomains in section [smtpgw.network] (special
This deployment scenario is the most convenient, especially if the in-
stallation of Kaspersky SMTP-Gateway is performed concurrently with
the deployment of the network and of the company’s mail system.
This deployment scenario is recommended if you are sure of the reli-
ability of your mail system. The installation of the application will not
affect the stability of your mail system.