To switch Kaspersky Secure Mail Gateway to limited traffic mode:
In the main window of the program web interface, open the management console tree and select the Settings section and Protection subsection.
In the External Services section, click the Usage of KSN / KPSN link to open the Usage of KSN / KPSN window.
Select Do not use KSN / KPSN.
Click the Apply button.
The Usage of KSN / KPSN window closes.
In the External Services section, click the Allow connection to DNS server link to open the External Services window.
In the list on the right of the name of the Allow connection to DNS server setting, select No.
Click the Apply button.
The External Services window closes.
In the Anti-Spam section, click any of the Use KSN, Use enforced Anti-Spam Updates Service, Use reputation filtering or Maximum scanning time links to open the Anti-Spam settings window.
In the External services settings group, in the Use enforced Anti-Spam Updates Service drop-down list, select No.
Click the Apply button.
The Anti-Spam settings window closes.
In the main window of the program web interface, open the management console tree and select the Settings section and Database Update subsection.
In the Program Database Update Settings section, click the Update source link to open the Program database update settings window.
In the Update source settings group, select Kaspersky Security Center.
Clear the If inaccessible, use Kaspersky Lab servers check box.
Click the OK button.
The Program database update settings window is closed.
Kaspersky Secure Mail Gateway starts running in limited traffic mode.