User Guide

Application deployment scenarios 13
• compliance of the email message size (as well as the mail ses-
sion and the total number of messages within the session) with
the specified limits specified in the application settings.
• compliance of the number of open sessions (from all IP ad-
dresses or a single IP address)with the specified limits specified
in the application settings.
If the message satisfies the preliminary processing, it is sent to the working
queue to be processed by the anti-virus engine.
3. The processing (scanning and disinfecting) procedure is as follows:
a. The AV module receives an object to be processed from the
working queue.
b. The AV module scans the object and, if this option is enabled,
disinfects it using the anti-virus database records. Then it passes
the scanned object to the ready-to-send message queue along with
the return code that indicates the object’s status.
c. The Sender module handles the object depending on the object’s
status, as defined by the settings stored in the configuration file.
4. Scanned messages together with the information on the scan and
disinfection results are transferred via the SMTP protocol to the onward
mail agent to be delivered to local end users or rerouted to other mail
servers.
Figure 2. Kaspersky SMTP-Gateway working queue.
5. If saving a backup copy in the backup storage or in the quarantine is
specified as the action to be performed on a message (see Figure 3),
the copy of the scanned object will be saved in the backup storage or in
the quarantine concurrently with sending it to the ready-to-send queue
(depending on the message status).