A key file is a file with the .key extension that you receive from Kaspersky. The purpose of the key file is to add a license key to activate the application.
You receive a key file at the email address that you provided when you bought Kaspersky Security 8 for Linux Mail Server or ordered the trial version of Kaspersky Security 8 for Linux Mail Server.
You do not need to connect to Kaspersky activation servers in order to activate the application with a key file.
You can recover a key file if it is accidentally deleted. You may need a key file to register with Kaspersky CompanyAccount.
To recover a key file, do one of the following: