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 you specified after purchasing Kaspersky Secure Mail Gateway or after requesting the trial version of Kaspersky Secure Mail Gateway.
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: