Here are the steps to block an email address on your Kaspersky.First, you have to access your main application window.Then, click on the gear icon in the lower field of the window. After that, the Settings window will appear on the screen. Head to the right part of the protection section and then select the anti-spam. Then, an anti-spam window will show up on display. Go to the right pane, and enable the switch of the anti-spam. Now, move to the Security level section and ensure that the recommended security is chosen.