How to configure Mail Anti-Virus

Kaspersky Anti-Virus allows scanning email messages for dangerous objects by using Mail Anti-Virus. Mail Anti-Virus starts when the operating system is started and remains constantly in the RAM of the computer, scanning all email messages that are sent or received over the POP3, SMTP, IMAP, and NNTP protocols, as well as via encrypted connections (SSL) over the POP3, SMTP, and IMAP protocols.

By default, Mail Anti-Virus scans both incoming and outgoing messages. If necessary, you can enable scanning of incoming messages only.

To configure Mail Anti-Virus:

1. Open the main application window.
2. Click the button in the lower part of the window.

   The Settings window opens.

3. In the left part of the window, in the Protection section, select the Mail Anti-Virus component.

   The Mail Anti-Virus settings are displayed in the window.

4. Make sure that the switch in the upper part of the window that enables / disables Mail Anti-Virus, is enabled.
5. Select a security level:
   • Recommended. When this security level is set, Mail Anti-Virus scans incoming and outgoing messages and attached archives, and performs heuristic analysis with the Medium scan level of detail.
   • Low. If you select this security level, Mail Anti-Virus scans incoming messages only, without scanning attached archives.
   • High. When this security level is set, Mail Anti-Virus scans incoming and outgoing messages and attached archives, and performs heuristic analysis with the Deep scan level of detail.
6. In the Action on threat detection drop-down list, select the action that you want for Mail Anti-Virus to perform when an infected object is detected (for example, disinfect).

If no threats are detected in an email message, or if all infected objects have been successfully disinfected, the message becomes available for further access. If the component fails to disinfect an infected object, Mail Anti-Virus renames or deletes the object from the message and adds a notification to the message subject line, stating that the message has been processed by Kaspersky Anti-Virus. Before deleting an object, Kaspersky Anti-Virus creates a backup copy of it and places a copy in Quarantine.

When you upgrade to a more recent application version, the user-configured Mail Anti-Virus settings are not saved. The new application version will use the default Mail Anti-Virus settings.

If Kaspersky Anti-Virus detects the password for the archive in the message text during scanning, the password is used to scan the contents of that archive for malware. The password is not saved. The archive is unpacked before scanning. If the application crashes while unpacking the archive, you can manually delete the files that are unpacked at the following path: %systemroot%\temp. The files have the PR prefix.