With this button, you can enable / disable Mail Anti-Virus.

If the button is green, Mail Anti-Virus runs when the operating system is started. It is loaded in the RAM of the computer and scans email messages transmitted via the POP3, SMTP, IMAP, MAPI, and NNTP protocols, as well as email messages sent over secure connections (SSL) via the POP3, SMTP, and IMAP protocols.

If the button is red, Mail Anti-Virus is disabled.

By default, the button is green.

When this security level is selected, Mail Anti-Virus applies maximum scrutiny to email messages. Mail Anti-Virus scans incoming and outgoing messages and attached archives, and performs heuristic analysis with the Deep scan level of detail.

The High security level is applied when working in a dangerous computing environment. An example of such an environment is a connection to a free email service from a home network that is not guarded by centralized email protection.

This security level ensures the optimum balance between operating system performance and security. When the Recommended 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.

This is the default security level.

When this security level is selected, Mail Anti-Virus scans incoming messages only and performs heuristic analysis with the Light scan level of detail. Attached archives are not scanned. If the Low security level is set, Mail Anti-Virus scans email messages at maximum speed and uses up fewer operating system resources.

The Low security level is used when working in a reliably protected environment. An example of such an environment might be a corporate network with centralized email security.

Clicking the link causes Kaspersky Internet Security to apply the Recommended security level. The link is displayed if you have modified the email scan settings in the Advanced settings of Mail Anti-Virus window, except for the settings in the Connectivity section.

In the drop-down list, you can select the action that Mail Anti-Virus performs when an infected or probably infected object is detected.

• Prompt on detection. Mail Anti-Virus informs you of detection of an infected or probably infected object, prompting you for further actions to take on this object.

  This value is available in the list and is selected by default if interactive protection mode is enabled.

• Select action automatically. When infected or probably infected objects are detected, Mail Anti-Virus automatically performs the action that is recommended by Kaspersky specialists. For infected objects, this action is Disinfect. This value is selected by default.

  Before attempting to disinfect or delete an infected object, Mail Anti-Virus creates a backup copy in case there is a later need to restore the object or possibility of disinfecting it.

  This value is available in the list and is selected by default if automatic protection mode is enabled.

• Disinfect. Mail Anti-Virus attempts to disinfect all infected objects that are detected. If the disinfection attempt fails, Mail Anti-Virus allows the message through, adding a warning to its subject line about an infected object in the message. Relevant information is saved in a report.
• Disinfect, if not possible – delete. Mail Anti-Virus attempts to disinfect all infected objects that are detected. If disinfection fails, Mail Anti-Virus deletes these objects.
• Block. Mail Anti-Virus
  blocks

  Denying access to an object from third-party applications. A blocked object cannot be read, executed, modified, or deleted.

  access to an infected or probably infected object. Relevant information is saved in a report.
• Delete. Mail Anti-Virus deletes an infected or probably infected object. Relevant information is saved in a report.

Clicking this link opens the Advanced settings of Mail Anti-Virus window. In this window you can modify the protection scope of Mail Anti-Virus, set the intensity of message analysis by Heuristic Analyzer, configure the scan settings for different types of files and the settings of Mail Anti-Virus integration into the operating system.